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ROLLOUT 1 · Qiskit/qiskit-terra

qiskit__qiskit-terra-5833

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471 stotal time
11tool calls
11model calls
7,142tokens generated
105,876prompt tokens read

Empty agent patch

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Token shading: p ≥ 0.9 0.5 – 0.9 0.2 – 0.5 below 0.2. Hover a token for its id and probability.

System instructions 4,822 characters
You are a principal Python software engineer resolving a repository issue in `/workspace`.
Your sole objective is to produce a minimal, root-cause source patch that passes every hidden fail-to-pass and pass-to-pass regression test on the first grading run.

## Critical Environment & Grader Rules
1. **Air-Gapped Sandbox & Available CLI Tools**: No network access. Never run `pip`, `uv`, `conda`, or `git fetch`. Note: `rg` (`ripgrep`) is NOT installed in the container — always use `grep -rn --include="*.py"` for fast exact searches so you never waste a tool call on `command not found`.
2. **Protected Grading Paths**: Before running official verification, the grading harness **strips and reverts all changes** to `tests/`, `test/`, `testing/`, `test_*.py`, `*_test.py`, `conftest.py`, `pyproject.toml`, `setup.cfg`, `pytest.ini`, and `tox.ini`. Every part of your fix MUST reside in non-test production source files.
3. **Untracked File Trap (`git add -N .`)**: `submit_patch` stages ALL untracked files inside `/workspace`! Never leave reproduction or scratch files inside `/workspace` — run reproductions inline via `python3 - <<'PY'` or inside `/tmp/repro.py` in a single `run_command`.
4. **Stdout Truncation Rule**: `run_command` truncates stdout after the first 5,000 characters from the TOP. Always run pytest quietly with short tracebacks:
   `pytest path/to/test_file.py -k pattern -q --tb=short --no-header`
   If a test file is large, redirect output to `/tmp/pytest.log` and inspect `tail -n 80 /tmp/pytest.log` so failure tracebacks at the bottom are never cut off.
5. **Strict Pacing Discipline**: `get_status` and `submit_patch` are free and do NOT count toward `max_tool_calls`. Target **16-22 counted tool calls total**, and **begin your first `edit_file` change no later than tool call 15**. Reserve at least 4 calls for verification, `git status --short && git diff`, and submission.

## Execution Protocol

### Phase 1 — Pinpoint Code & Tests Immediately (1-2 tool calls)
- The user message already contains `Workspace Layout` — do NOT waste a turn running `ls` on top-level directories.
- Run a single compound `run_command` with `grep -rn --include="*.py"` to locate:
  (a) the exact symbols, error strings, or functions from the problem description,
  (b) **all parallel or sibling implementations** (for example sync + async variants, `Client` + `AsyncClient`, serializer + deserializer, multiple backends/dialects, base + subclass methods, `__init__.py` / `__all__` exports), and
  (c) the closest existing unit test files under `tests/`.

### Phase 2 — Deep Read & Spec Anchor (2-5 tool calls)
- Use `read_file` with generous `start_line` and `end_line` windows (180-300 lines per call so you read whole modules in fewer calls) on the target function/class, callers, type annotations, and neighboring tests.
- Before editing, verify every explicit and implicit requirement from the issue: exact parameter names, defaults, boundary/domain edge cases, exception types/messages, `None` vs empty collection vs falsy (`0`, `False`, `""`) semantics, mutability/copying, and return types.

### Phase 3 — Reproduce Bug in One Call (1 tool call)
- Run ONE concise command (`python3 - <<'PY' ... PY` or targeted `pytest ... -q --tb=short --no-header`) via `run_command` to observe the exact pre-fix failure. Do NOT spend multiple tool calls writing separate reproduction scripts.

### Phase 4 — Surgical Implementation Across All Parallel Paths (1-4 tool calls)
- Begin editing by tool call 15! Use `edit_file` with 4-6 lines of exact surrounding context copied from `read_file`.
- Update ALL parallel codepaths (sync/async, multiple classes/dialects, type hints) consistently so partial fixes do not fail sibling tests.
- **2-Strike Edit Rule**: If `edit_file` fails twice on the same block due to whitespace or escaping, do not retry `edit_file` a third time — apply an atomic Python transformation via `run_command` and immediately verify `python3 -m py_compile path/to/file.py`.

### Phase 5 — Edge-Case Verification, Diff Hygiene & Clean Exit (2-4 tool calls)
- Run a single compound `run_command` testing both your reproduction + boundary edge cases (`None`, empty input, leading/trailing delimiters, subdomain/prefix boundaries, subclass/async parity) AND the relevant existing `pytest` module(s) with `-q --tb=short --no-header`.
- Run `git status --short && git diff` via `run_command`. Confirm:
  - ZERO untracked (`??`) files in `/workspace` (`rm -f` any untracked workspace files immediately),
  - ZERO modifications to `tests/` or protected config files (`git checkout -- tests/` if touched),
  - Minimal, clean diff with valid imports and indentation.
- Call `submit_patch` once verification passes, then respond with a brief 2-sentence plain-text summary and make NO further tool calls.
Task prompt 10,333 characters
You are evaluating a software engineering task for repository Qiskit/qiskit-terra.

Problem Statement:
OptimizeSwapBeforeMeasure needs multiple invocations
The `OptimizeSwapBeforeMeasure` pass is supposed to commute quantum SWAP gates that immediately precede measurements, past the measurements, and instead convert them to classical swap (i.e.just retarget the measurement clbit).

However this should be generalized to work with any permutation that happens before the measurements, not just one swap layer. I made this work by invoking it many times for the example below, but really one invocation should be smart enough to remove all the swaps (that whole swap network should be modeled as a permutation).

```py
from qiskit import QuantumCircuit
from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint
from qiskit.transpiler import PassManager

circ = QuantumCircuit(8, 8)
circ.swap(3, 4)
circ.swap(6, 7)
circ.swap(0, 1)
circ.swap(6, 7)
circ.swap(4, 5)
circ.swap(0, 1)
circ.swap(5, 6)
circ.swap(3, 4)
circ.swap(1, 2)
circ.swap(6, 7)
circ.swap(4, 5)
circ.swap(2, 3)
circ.swap(0, 1)
circ.swap(5, 6)
circ.swap(1, 2)
circ.swap(6, 7)
circ.swap(4, 5)
circ.swap(2, 3)
circ.swap(3, 4)
circ.swap(3, 4)
circ.swap(5, 6)
circ.swap(1, 2)
circ.swap(4, 5)
circ.swap(2, 3)
circ.swap(5, 6)
circ.measure(range(8), range(8))
print(circ)

_depth_check = [Depth(), FixedPoint('depth')]
_opt = [OptimizeSwapBeforeMeasure()]
def _opt_control(property_set):
    return not property_set['depth_fixed_point']

pm = PassManager()
pm.append(_depth_check + _opt, do_while=_opt_control)  # should not need this do_while
print(pm.run(circ))
```

```
                    ┌─┐                                 
q_0: ─X──X─────X────┤M├─────────────────────────────────
      │  │     │    └╥┘         ┌─┐                     
q_1: ─X──X──X──X──X──╫─────X────┤M├─────────────────────
            │     │  ║     │    └╥┘      ┌─┐            
q_2: ───────X──X──X──╫──X──X─────╫──X────┤M├────────────
               │     ║  │        ║  │    └╥┘┌─┐         
q_3: ─X─────X──X─────╫──X──X──X──╫──X─────╫─┤M├─────────
      │     │        ║     │  │  ║        ║ └╥┘┌─┐      
q_4: ─X──X──X──X─────╫──X──X──X──╫──X─────╫──╫─┤M├──────
         │     │     ║  │        ║  │     ║  ║ └╥┘┌─┐   
q_5: ────X──X──X──X──╫──X──X─────╫──X──X──╫──╫──╫─┤M├───
            │     │  ║     │     ║     │  ║  ║  ║ └╥┘┌─┐
q_6: ─X──X──X──X──X──╫──X──X─────╫─────X──╫──╫──╫──╫─┤M├
      │  │     │     ║  │ ┌─┐    ║        ║  ║  ║  ║ └╥┘
q_7: ─X──X─────X─────╫──X─┤M├────╫────────╫──╫──╫──╫──╫─
                     ║    └╥┘    ║        ║  ║  ║  ║  ║ 
c: 8/════════════════╩═════╩═════╩════════╩══╩══╩══╩══╩═
                     0     7     1        2  3  4  5  6 
           ┌─┐               
q_0: ──────┤M├───────────────
        ┌─┐└╥┘               
q_1: ───┤M├─╫────────────────
     ┌─┐└╥┘ ║                
q_2: ┤M├─╫──╫────────────────
     └╥┘ ║  ║    ┌─┐         
q_3: ─╫──╫──╫────┤M├─────────
      ║  ║  ║    └╥┘      ┌─┐
q_4: ─╫──╫──╫─────╫───────┤M├
      ║  ║  ║ ┌─┐ ║       └╥┘
q_5: ─╫──╫──╫─┤M├─╫────────╫─
      ║  ║  ║ └╥┘ ║ ┌─┐    ║ 
q_6: ─╫──╫──╫──╫──╫─┤M├────╫─
      ║  ║  ║  ║  ║ └╥┘┌─┐ ║ 
q_7: ─╫──╫──╫──╫──╫──╫─┤M├─╫─
      ║  ║  ║  ║  ║  ║ └╥┘ ║ 
c: 8/═╩══╩══╩══╩══╩══╩══╩══╩═
      0  1  2  3  4  5  6  7 
```

## Task Budget (Session terminates when any budget is exhausted)
- Time allowance: 7.5 minutes
- Tool calls allowance: 30 calls
- Max loop iterations: 40 turns

## Execution Environment Rules
- Single command timeout: 90 seconds (commands exceeding this fail without ending the session)
- Command output limit: 5000 characters
- File view limit: 150 lines per read_file call
- File character limit: 10000 characters per read_file call
- Environment is offline (no network/PyPI access). All repository and test dependencies are ALREADY pre-installed. Do NOT attempt to run pip install or download packages.

## Instructions:
0. All source code is under `/workspace`. Do NOT search outside `/workspace` (e.g. `/usr/`, `/wheels/`, system site-packages). If imports fail, the issue is in the source code under `/workspace`, not in missing system packages.
1. Analyze the problem statement and any provided hints carefully to identify all requested script paths, CLI subcommands, or Python modules.
2. Inspect existing codebase conventions and test files before making edits.
3. Verify your implementation using targeted tests or inline assertions before submitting.
4. Call submit_patch only after your implementation is complete and verified.
5. As your final action, you must return a text-only response reporting your completion to terminate the session.
## Workspace Layout
The repository is located at `/workspace`. Here is the directory tree (up to 3 levels):
```
./CODE_OF_CONDUCT.md
./CONTRIBUTING.md
./LICENSE.txt
./MANIFEST.in
./Make.bat
./Makefile
./README.md
./azure-pipelines.yml
./constraints.txt
./docs
./examples
./postBuild
./pyproject.toml
./qiskit
./qiskit/VERSION.txt
./qiskit/__init__.py
./qiskit/algorithms
./qiskit/algorithms/__init__.py
./qiskit/algorithms/algorithm_result.py
./qiskit/algorithms/amplitude_amplifiers
./qiskit/algorithms/amplitude_estimators
./qiskit/algorithms/eigen_solvers
./qiskit/algorithms/exceptions.py
./qiskit/algorithms/factorizers
./qiskit/algorithms/minimum_eigen_solvers
./qiskit/algorithms/optimizers
./qiskit/algorithms/variational_algorithm.py
./qiskit/algorithms/variational_forms
./qiskit/assembler
./qiskit/assembler/__init__.py
./qiskit/assembler/assemble_circuits.py
./qiskit/assembler/assemble_schedules.py
./qiskit/assembler/disassemble.py
./qiskit/assembler/run_config.py
./qiskit/circuit
./qiskit/circuit/__init__.py
./qiskit/circuit/_utils.py
./qiskit/circuit/add_control.py
./qiskit/circuit/barrier.py
./qiskit/circuit/bit.py
./qiskit/circuit/classicalfunction
./qiskit/circuit/classicalregister.py
./qiskit/circuit/controlledgate.py
./qiskit/circuit/delay.py
./qiskit/circuit/duration.py
./qiskit/circuit/equivalence.py
./qiskit/circuit/equivalence_library.py
./qiskit/circuit/exceptions.py
./qiskit/circuit/gate.py
./qiskit/circuit/instruction.py
./qiskit/circuit/instructionset.py
./qiskit/circuit/library
./qiskit/circuit/measure.py
./qiskit/circuit/parameter.py
./qiskit/circuit/parameterexpression.py
./qiskit/circuit/parametertable.py
./qiskit/circuit/parametervector.py
./qiskit/circuit/quantumcircuit.py
./qiskit/circuit/quantumcircuitdata.py
./qiskit/circuit/quantumregister.py
./qiskit/circuit/random
./qiskit/circuit/register.py
./qiskit/circuit/reset.py
./qiskit/circuit/tools
./qiskit/compiler
./qiskit/compiler/__init__.py
./qiskit/compiler/assembler.py
./qiskit/compiler/scheduler.py
./qiskit/compiler/sequencer.py
./qiskit/compiler/transpiler.py
./qiskit/converters
./qiskit/converters/__init__.py
./qiskit/converters/ast_to_dag.py
./qiskit/converters/circuit_to_dag.py
./qiskit/converters/circuit_to_dagdependency.py
./qiskit/converters/circuit_to_gate.py
./qiskit/converters/circuit_to_instruction.py
./qiskit/converters/dag_to_circuit.py
./qiskit/converters/dag_to_dagdependency.py
./qiskit/converters/dagdependency_to_circuit.py
./qiskit/converters/dagdependency_to_dag.py
./qiskit/dagcircuit
./qiskit/dagcircuit/__init__.py
./qiskit/dagcircuit/dagcircuit.py
./qiskit/dagcircuit/dagdependency.py
./qiskit/dagcircuit/dagdepnode.py
./qiskit/dagcircuit/dagnode.py
./qiskit/dagcircuit/exceptions.py
./qiskit/exceptions.py
./qiskit/execute_function.py
./qiskit/extensions
./qiskit/extensions/__init__.py
./qiskit/extensions/exceptions.py
./qiskit/extensions/hamiltonian_gate.py
./qiskit/extensions/quantum_initializer
./qiskit/extensions/simulator
./qiskit/extensions/unitary.py
./qiskit/opflow
./qiskit/opflow/__init__.py
./qiskit/opflow/converters
./qiskit/opflow/evolutions
./qiskit/opflow/exceptions.py
./qiskit/opflow/expectations
./qiskit/opflow/gradients
./qiskit/opflow/list_ops
./qiskit/opflow/operator_base.py
./qiskit/opflow/operator_globals.py
./qiskit/opflow/primitive_ops
./qiskit/opflow/state_fns
./qiskit/providers
./qiskit/providers/__init__.py
./qiskit/providers/backend.py
./qiskit/providers/basebackend.py
./qiskit/providers/basejob.py
./qiskit/providers/baseprovider.py
./qiskit/providers/basicaer
./qiskit/providers/exceptions.py
./qiskit/providers/job.py
./qiskit/providers/jobstatus.py
./qiskit/providers/models
./qiskit/providers/options.py
./qiskit/providers/provider.py
./qiskit/providers/providerutils.py
./qiskit/pulse
./qiskit/pulse/__init__.py
./qiskit/pulse/builder.py
./qiskit/pulse/channels.py
./qiskit/pulse/configuration.py
./qiskit/pulse/exceptions.py
./qiskit/pulse/instruction_schedule_map.py
./qiskit/pulse/instructions
./qiskit/pulse/interfaces.py
./qiskit/pulse/library
./qiskit/pulse/macros.py
./qiskit/pulse/parser.py
./qiskit/pulse/reschedule.py
./qiskit/pulse/schedule.py
./qiskit/pulse/transforms.py
./qiskit/pulse/utils.py
./qiskit/qasm
./qiskit/qasm/__init__.py
./qiskit/qasm/exceptions.py
./qiskit/qasm/libs
./qiskit/qasm/node
./qiskit/qasm/pygments
./qiskit/qasm/qasm.py
./qiskit/qasm/qasmlexer.py
./qiskit/qasm/qasmparser.py
./qiskit/qobj
./qiskit/qobj/__init__.py
./qiskit/qobj/common.py
./qiskit/qobj/converters
./qiskit/qobj/pulse_qobj.py
./qiskit/qobj/qasm_qobj.py
./qiskit/qobj/utils.py
./qiskit/quantum_info
./qiskit/quantum_info/__init__.py
./qiskit/quantum_info/analysis
./qiskit/quantum_info/operators
./qiskit/quantum_info/random.py
./qiskit/quantum_info/states
./qiskit/quantum_info/synthesis
./qiskit/result
./qiskit/result/__init__.py
./qiskit/result/counts.py
./qiskit/result/exceptions.py
./qiskit/result/models.py
./qiskit/result/postprocess.py
./qiskit/result/result.py
./qiskit/result/utils.py
./qiskit/scheduler
./qiskit/scheduler/__init__.py
./qiskit/schemas
./qiskit/test
./qiskit/tools
./qiskit/transpiler
./qiskit/user_config.py
./qiskit/util.py
./qiskit/utils
./qiskit/validation
./qiskit/version.py
./qiskit/visualization
./releasenotes
./releasenotes/config.yaml
./releasenotes/notes
./requirements-dev.txt
./requirements.txt
./setup.py
./test
./test/__init__.py
./test/ipynb
./test/python
./test/randomized
./tools
./tools/find_optional_imports.py
./tools/report_ci_failure.py
./tools/subunit_to_junit.py
./tools/update_fake_backends.py
./tools/verify_headers.py
./tox.ini
```
Turn 1at 33 s173 tokens out5,925 prompt tokens
The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit.
The pass is supposed to move SWAP gates that immediately precede measurements past the measurements and convert them into classical swaps (retargeting the clbit).
However, it currently only handles one layer of swaps. If there are multiple layers of swaps before the measurements, it needs to be invoked multiple times.
The goal is to make a single invocation of `OptimizeSwapBeforeMeasure` handle any permutation of SWAP gates that can be commuted past the measurements.

First, I need to locate the `OptimizeSwapBeforeMeasure` pass implementation.
TOOL CALL · run_command
{
  "command": "grep -rn --include=\"*.py\" \"OptimizeSwapBeforeMeasure\" | grep \"class OptimizeSwapBeforeMeasure\""
}
Result of run_command 187 characters
{
  "status": "ok",
  "stdout": "qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py:22:class OptimizeSwapBeforeMeasure(TransformationPass):\n",
  "stderr": "",
  "exit_code": 0
}
Generated tokens 173 tokens · stopped: STOP
<|channel>thought The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit. The pass is supposed to move SWAP gates that immediately precede measurements past the measurements and convert them into classical swaps (retargeting the clbit). However, it currently only handles one layer of swaps. If there are multiple layers of swaps before the measurements, it needs to be invoked multiple times. The goal is to make a single invocation of `OptimizeSwapBeforeMeasure` handle any permutation of SWAP gates that can be commuted past the measurements. First, I need to locate the `OptimizeSwapBeforeMeasure` pass implementation.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "OptimizeSwapBeforeMeasure" | grep "class OptimizeSwapBeforeMeasure"<|"|>}<tool_call|><|tool_response>
Turn 2at 88 s882 tokens out6,172 prompt tokens
Okay, the class is located in `qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`.
Now, I'll create a reproduction script to confirm the bug.
The user provided a clear example in the problem statement.
TOOL CALL · run_command
{
  "command": "cat <<'PY' > /tmp/repro.py\nfrom qiskit import QuantumCircuit\nfrom qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint\nfrom qiskit.transpiler import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\nprint(\"Original circuit depth (roughly):\")\nprint(circ)\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nprint(\"\\nAfter one invocation of OptimizeSwapBeforeMeasure:\")\nprint(result)\n\n# Verify if all swaps before measure are gone.\n# In a fully optimized circuit, there should be no swap gates before the measurements.\n# Actually, the goal is to see if it needs multiple invocations.\n\n# Let's count the number of swap gates in the resulting circuit.\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f\"\\nNumber of swap gates remaining: {swap_count}\")\n\n# For comparison, the user said they used FixedPoint to make it work.\npm_fixed = PassManager()\n_depth_check = [Depth(), FixedPoint('depth')]\n_opt = [OptimizeSwapBeforeMeasure()]\ndef _opt_control(property_set):\n    # This is a bit simplified, usually property_set contains 'depth'\n    # In a real scenario, it would return False when depth stops decreasing.\n    return True # Just to see if it eventually finishes\n\n# We can just run it in a loop until no more swaps are removed.\ncurrent_circ = circ\nwhile True:\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f\"\\nNumber of swap gates after loop: {next_swaps}\")\n PY\npython3 /tmp/repro.py\n"
}
Result of run_command 153 characters
{
  "status": "ok",
  "stdout": "",
  "stderr": "/bin/bash: line 85: warning: here-document at line 1 delimited by end-of-file (wanted `PY')\n",
  "exit_code": 0
}
Generated tokens 882 tokens · stopped: STOP
Okay, the class is located in `qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`. Now, I'll create a reproduction script to confirm the bug. The user provided a clear example in the problem statement. <channel|><|tool_call>call:run_command{command:<|"|>cat <<'PY' > /tmp/repro.py from qiskit import QuantumCircuit from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint from qiskit.transpiler import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) print("Original circuit depth (roughly):") print(circ) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) print("\nAfter one invocation of OptimizeSwapBeforeMeasure:") print(result) # Verify if all swaps before measure are gone. # In a fully optimized circuit, there should be no swap gates before the measurements. # Actually, the goal is to see if it needs multiple invocations. # Let's count the number of swap gates in the resulting circuit. swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f"\nNumber of swap gates remaining: {swap_count}") # For comparison, the user said they used FixedPoint to make it work. pm_fixed = PassManager() _depth_check = [Depth(), FixedPoint('depth')] _opt = [OptimizeSwapBeforeMeasure()] def _opt_control(property_set): # This is a bit simplified, usually property_set contains 'depth' # In a real scenario, it would return False when depth stops decreasing. return True # Just to see if it eventually finishes # We can just run it in a loop until no more swaps are removed. current_circ = circ while True: pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f"\nNumber of swap gates after loop: {next_swaps}") PY python3 /tmp/repro.py <|"|>}<tool_call|><|tool_response>
Turn 3at 122 s737 tokens out7,124 prompt tokens
Ah, I had a syntax error in the `cat` command (missing closing `PY` or something). Let me try again and be more careful with the quotation and heredoc.
Actually, I can just write the file using `write_file`.
Wait, I see what happened. The `PY` was probably not closed correctly due to how I wrote the command.

Let's use `write_file`.
TOOL CALL · write_file
{
  "content": "from qiskit import QuantumCircuit\nfrom qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint\nfrom qiskit.transpiler import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\nprint(\"Original circuit:\")\nprint(circ)\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nprint(\"\\nAfter one invocation of OptimizeSwapBeforeMeasure:\")\nprint(result)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f\"\\nNumber of swap gates remaining: {swap_count}\")\n\n# Now run it in a loop to see the difference.\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f\"\\nNumber of swap gates after {iteration} iterations: {next_swaps}\")\n",
  "filepath": "/tmp/repro.py"
}
Result of write_file 136 characters
{
  "status": "error",
  "error_type": "FileWriteError",
  "error_message": "Path traversal detected: '/tmp/repro.py' escapes workspace root."
}
Generated tokens 737 tokens · stopped: STOP
Ah, I had a syntax error in the `cat` command (missing closing `PY` or something). Let me try again and be more careful with the quotation and heredoc. Actually, I can just write the file using `write_file`. Wait, I see what happened. The `PY` was probably not closed correctly due to how I wrote the command. Let's use `write_file`. <channel|><|tool_call>call:write_file{content:<|"|>from qiskit import QuantumCircuit from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint from qiskit.transpiler import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) print("Original circuit:") print(circ) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) print("\nAfter one invocation of OptimizeSwapBeforeMeasure:") print(result) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f"\nNumber of swap gates remaining: {swap_count}") # Now run it in a loop to see the difference. current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f"\nNumber of swap gates after {iteration} iterations: {next_swaps}") <|"|>,filepath:<|"|>/tmp/repro.py<|"|>}<tool_call|><|tool_response>
Turn 4at 153 s717 tokens out7,915 prompt tokens
I forgot that I cannot write to `/tmp` using `write_file`. I must write to the workspace. But waiting, the rule says: "Never leave reproduction or scratch files inside /workspace — run reproductions inline via python3 - <<'PY' or inside /tmp/repro.py in a single run_command".
Okay, so `run_command` is the way. I'll try it again with a simple heredoc.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nfrom qiskit import QuantumCircuit\nfrom qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint\nfrom qiskit.transpiler import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f\"Number of swap gates remaining after one invocation: {swap_count}\")\n\n# Now run it in a loop to see if more can be removed.\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f\"Number of swap gates remaining after {iteration} iterations: {next_swaps}\")\nPY\n"
}
Result of run_command 4,871 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
  "details": {
    "stdout": "",
    "stderr": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
    "exit_code": 1
  }
}
Generated tokens 717 tokens · stopped: STOP
I forgot that I cannot write to `/tmp` using `write_file`. I must write to the workspace. But waiting, the rule says: "Never leave reproduction or scratch files inside /workspace — run reproductions inline via python3 - <<'PY' or inside /tmp/repro.py in a single run_command". Okay, so `run_command` is the way. I'll try it again with a simple heredoc. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' from qiskit import QuantumCircuit from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure, Depth, FixedPoint from qiskit.transpiler import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f"Number of swap gates remaining after one invocation: {swap_count}") # Now run it in a loop to see if more can be removed. current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f"Number of swap gates remaining after {iteration} iterations: {next_swaps}") PY <|"|>}<tool_call|><|tool_response>
Turn 5at 211 s1,048 tokens out10,175 prompt tokens
It seems like there is a `ModuleNotFoundError` related to cython modules. This is strange for the environment.
`ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'`

Wait, I'm importing `QuantumCircuit` from `qiskit`. This might be triggering a lot of imports, including some that are broken.
Maybe I can avoid importing the whole `qiskit` package if possible, or just import what I need more carefully.

Actually, the issue is in `qiskit.transpiler.passes.optimization.optimize_swap_before_measure`.
Let me try to import only the necessary components and see if it still fails.

Wait, `qiskit.transpiler.PassManager` and `OptimizeSwapBeforeMeasure` will still trigger many imports.
Let me see if I can run the repro script but avoid `from qiskit import QuantumCircuit` if possible, or maybe theCython modules are just not built in this environment and I should be aware of it.

Actually, if I'm just testing `OptimizeSwapBeforeMeasure`, maybe I don't need to import everything?
But `QuantumCircuit` is essential.

Let's see where the error comes from:
`qiskit/__init__.py` -> `qiskit/execute_function.py` -> `qiskit/compiler/__init__.py` -> `qiskit/compiler/transpiler.py` -> `qiskit/transpiler/passes/__init__.py` -> ... -> `qiskit/transpiler/passes/routing/stochastic_swap.py` -> `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils`.

The issue is that `import qiskit` triggers everything.
If I import from `qiskit.circuit` instead of `qiskit`, I might avoid the `qiskit.execute_function` path.

Let me try this:
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nfrom qiskit.circuit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure\nfrom qiskit.transpiler import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f\"Number of swap gates remaining after one invocation: {swap_count}\")\n\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f\"Number of swap gates remaining after {iteration} iterations: {next_swaps}\")\nPY\n"
}
Result of run_command 4,871 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
  "details": {
    "stdout": "",
    "stderr": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
    "exit_code": 1
  }
}
Generated tokens 1,048 tokens · stopped: STOP
It seems like there is a `ModuleNotFoundError` related to cython modules. This is strange for the environment. `ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'` Wait, I'm importing `QuantumCircuit` from `qiskit`. This might be triggering a lot of imports, including some that are broken. Maybe I can avoid importing the whole `qiskit` package if possible, or just import what I need more carefully. Actually, the issue is in `qiskit.transpiler.passes.optimization.optimize_swap_before_measure`. Let me try to import only the necessary components and see if it still fails. Wait, `qiskit.transpiler.PassManager` and `OptimizeSwapBeforeMeasure` will still trigger many imports. Let me see if I can run the repro script but avoid `from qiskit import QuantumCircuit` if possible, or maybe theCython modules are just not built in this environment and I should be aware of it. Actually, if I'm just testing `OptimizeSwapBeforeMeasure`, maybe I don't need to import everything? But `QuantumCircuit` is essential. Let's see where the error comes from: `qiskit/__init__.py` -> `qiskit/execute_function.py` -> `qiskit/compiler/__init__.py` -> `qiskit/compiler/transpiler.py` -> `qiskit/transpiler/passes/__init__.py` -> ... -> `qiskit/transpiler/passes/routing/stochastic_swap.py` -> `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils`. The issue is that `import qiskit` triggers everything. If I import from `qiskit.circuit` instead of `qiskit`, I might avoid the `qiskit.execute_function` path. Let me try this: <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' from qiskit.circuit import QuantumCircuit from qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure from qiskit.transpiler import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f"Number of swap gates remaining after one invocation: {swap_count}") current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f"Number of swap gates remaining after {iteration} iterations: {next_swaps}") PY <|"|>}<tool_call|><|tool_response>
Turn 6at 224 s180 tokens out12,766 prompt tokens
It seems `from qiskit.transpiler import PassManager` is still triggering the import of `qiskit/__init__.py`.
Wait, look at the traceback:
`File "<stdin>", line 1, in <module>`
Wait, how is `qiskit/__init__.py` being imported?
Ah, I see. `from qiskit.transpiler import PassManager` probably does something that triggers `import qiskit`.

Let's try to be even more surgical. I'll import `PassManager` from `qiskit.transpiler.passmanager`. Let's find where `PassManager` is defined.
TOOL CALL · run_command
{
  "command": "grep -rn --include=\"*.py\" \"class PassManager\" qiskit/transpiler"
}
Result of run_command 185 characters
{
  "status": "ok",
  "stdout": "qiskit/transpiler/passmanager.py:27:class PassManager:\nqiskit/transpiler/passmanager_config.py:16:class PassManagerConfig:\n",
  "stderr": "",
  "exit_code": 0
}
Generated tokens 180 tokens · stopped: STOP
It seems `from qiskit.transpiler import PassManager` is still triggering the import of `qiskit/__init__.py`. Wait, look at the traceback: `File "<stdin>", line 1, in <module>` Wait, how is `qiskit/__init__.py` being imported? Ah, I see. `from qiskit.transpiler import PassManager` probably does something that triggers `import qiskit`. Let's try to be even more surgical. I'll import `PassManager` from `qiskit.transpiler.passmanager`. Let's find where `PassManager` is defined. <channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "class PassManager" qiskit/transpiler<|"|>}<tool_call|><|tool_response>
Turn 7at 247 s622 tokens out13,028 prompt tokens
Okay, let's try to import it from there.
TOOL CALL · run_command
{
  "command": "python3 - <<'PY'\nfrom qiskit.circuit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure\nfrom qiskit.transpiler.passmanager import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f\"Number of swap gates remaining after one invocation: {swap_count}\")\n\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f\"Number of swap gates remaining after {iteration} iterations: {next_swaps}\")\nPY\n"
}
Result of run_command 4,871 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
  "details": {
    "stdout": "",
    "stderr": "/workspace/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/workspace/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/workspace/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"<stdin>\", line 1, in <module>\n  File \"/workspace/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/workspace/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/workspace/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/workspace/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/workspace/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/workspace/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/workspace/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
    "exit_code": 1
  }
}
Generated tokens 622 tokens · stopped: STOP
Okay, let's try to import it from there. <channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY' from qiskit.circuit import QuantumCircuit from qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure from qiskit.transpiler.passmanager import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f"Number of swap gates remaining after one invocation: {swap_count}") current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f"Number of swap gates remaining after {iteration} iterations: {next_swaps}") PY <|"|>}<tool_call|><|tool_response>
Turn 8at 307 s992 tokens out15,193 prompt tokens
Wait, it's still importing `qiskit/__init__.py`. This is very strange.
Where could it be coming from?
Maybe `from qiskit.circuit import QuantumCircuit` does it?
Let's check `qiskit/circuit/__init__.py`.

Actually, the traceback says:
`File "<stdin>", line 1, in <module>`
`File "/workspace/qiskit/__init__.py", line 53, in <module>`

Line 1 of my script is `from qiskit.circuit import QuantumCircuit`.
Does `from qiskit.circuit import QuantumCircuit` import `qiskit/__init__.py`?
Usually, `from qiskit.circuit import ...` should only import `qiskit/circuit/__init__.py`.

Wait, if I'm running `python3 - <<'PY'`, maybe it's treating the current directory as part of the search path and something is weird.

Let's try to run the reproduction script as a file in `/tmp` but I already tried `write_file` and it failed.
Wait, the instruction said: "Never leave reproduction or scratch files inside /workspace — run reproductions inline via python3 - <<'PY' or inside /tmp/repro.py in a single run_command".

So I should do:
`run_command(command="python3 /tmp/repro.py")` but I need to put the content into `/tmp/repro.py` first.
I can do that with `bash -c "cat <<'EOF' > /tmp/repro.py ... EOF"`

Let's try that.
TOOL CALL · run_command
{
  "command": "bash -c \"cat <<'EOF' > /tmp/repro.py\nfrom qiskit.circuit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure\nfrom qiskit.transpiler.passmanager import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f'Number of swap gates remaining after one invocation: {swap_count}')\n\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}')\nEOF\npython3 /tmp/repro.py\""
}
Result of run_command 5,049 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 1, in <module>\n    from qiskit.circuit import QuantumCircuit\n  File \"/qiskit-terra/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/qiskit-terra/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/qiskit-terra/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/qiskit-terra/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
  "details": {
    "stdout": "",
    "stderr": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 1, in <module>\n    from qiskit.circuit import QuantumCircuit\n  File \"/qiskit-terra/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/qiskit-terra/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/qiskit-terra/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/qiskit-terra/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 27, in <module>\n    from .cython.stochastic_swap.utils import nlayout_from_layout\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
    "exit_code": 1
  }
}
Generated tokens 992 tokens · stopped: STOP
Wait, it's still importing `qiskit/__init__.py`. This is very strange. Where could it be coming from? Maybe `from qiskit.circuit import QuantumCircuit` does it? Let's check `qiskit/circuit/__init__.py`. Actually, the traceback says: `File "<stdin>", line 1, in <module>` `File "/workspace/qiskit/__init__.py", line 53, in <module>` Line 1 of my script is `from qiskit.circuit import QuantumCircuit`. Does `from qiskit.circuit import QuantumCircuit` import `qiskit/__init__.py`? Usually, `from qiskit.circuit import ...` should only import `qiskit/circuit/__init__.py`. Wait, if I'm running `python3 - <<'PY'`, maybe it's treating the current directory as part of the search path and something is weird. Let's try to run the reproduction script as a file in `/tmp` but I already tried `write_file` and it failed. Wait, the instruction said: "Never leave reproduction or scratch files inside /workspace — run reproductions inline via python3 - <<'PY' or inside /tmp/repro.py in a single run_command". So I should do: `run_command(command="python3 /tmp/repro.py")` but I need to put the content into `/tmp/repro.py` first. I can do that with `bash -c "cat <<'EOF' > /tmp/repro.py ... EOF"` Let's try that. <channel|><|tool_call>call:run_command{command:<|"|>bash -c "cat <<'EOF' > /tmp/repro.py from qiskit.circuit import QuantumCircuit from qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure from qiskit.transpiler.passmanager import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f'Number of swap gates remaining after one invocation: {swap_count}') current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}') EOF python3 /tmp/repro.py"<|"|>}<tool_call|><|tool_response>
Turn 9at 378 s133 tokens out7,461 prompt tokens
This is incredibly frustrating. `from qiskit.circuit import QuantumCircuit` is somehow triggering `import qiskit`.

Wait! I know what's happening. `qiskit` is a package. When I do `from qiskit.circuit import QuantumCircuit`, Python first imports `qiskit.__init__`.

If `qiskit/__init__.py` has imports that eventually lead to the failing Cython module, it will fail.

Let's look at `qiskit/__init__.py`.
TOOL CALL · read_file
{
  "filepath": "qiskit/__init__.py"
}
Result of read_file 4,296 characters
{
  "status": "ok",
  "filepath": "qiskit/__init__.py",
  "content": "# This code is part of Qiskit.\n#\n# (C) Copyright IBM 2017.\n#\n# This code is licensed under the Apache License, Version 2.0. You may\n# obtain a copy of this license in the LICENSE.txt file in the root directory\n# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.\n#\n# Any modifications or derivative works of this code must retain this\n# copyright notice, and modified files need to carry a notice indicating\n# that they have been altered from the originals.\n\n# pylint: disable=wrong-import-order,invalid-name,wrong-import-position\n\n\n\"\"\"Main Qiskit public functionality.\"\"\"\n\nimport pkgutil\nimport sys\nimport warnings\nimport os\n\n# qiskit errors operator\nfrom qiskit.exceptions import QiskitError\n\n# The main qiskit operators\nfrom qiskit.circuit import ClassicalRegister\nfrom qiskit.circuit import QuantumRegister\nfrom qiskit.circuit import AncillaRegister\nfrom qiskit.circuit import QuantumCircuit\n\n# user config\nfrom qiskit import user_config as _user_config\n\n# The qiskit.extensions.x imports needs to be placed here due to the\n# mechanism for adding gates dynamically.\nimport qiskit.extensions\nimport qiskit.circuit.measure\nimport qiskit.circuit.reset\n\n# Allow extending this namespace. Please note that currently this line needs\n# to be placed *before* the wrapper imports or any non-import code AND *before*\n# importing the package you want to allow extensions for (in this case `backends`).\n__path__ = pkgutil.extend_path(__path__, __name__)\n\n# Please note these are global instances, not modules.\nfrom qiskit.providers.basicaer import BasicAer\n\n_config = _user_config.get_config()\n\n# Moved to after IBMQ and Aer imports due to import issues\n# with other modules that check for IBMQ (tools)\nfrom qiskit.execute_function import execute  # noqa\nfrom qiskit.compiler import transpile, assemble, schedule, sequence  # noqa\n\nfrom .version import __version__  # noqa\nfrom .version import QiskitVersion  # noqa\n\n\n__qiskit_version__ = QiskitVersion()\n\n\nif sys.version_info[0] == 3 and sys.version_info[1] == 6:\n    warnings.warn(\n        \"Using Qiskit with Python 3.6 is deprecated as of the 0.17.0 release. \"\n        \"Support for running Qiskit with Python 3.6 will be removed in a \"\n        \"future release.\", DeprecationWarning)\n\n\nclass AerWrapper:\n    \"\"\"Lazy loading wrapper for Aer provider.\"\"\"\n\n    def __init__(self):\n        self.aer = None\n\n    def __bool__(self):\n        if self.aer is None:\n            try:\n                from qiskit.providers import aer\n                self.aer = aer.Aer\n            except ImportError:\n                return False\n        return True\n\n    def __getattr__(self, attr):\n        if not self.aer:\n            try:\n                from qiskit.providers import aer\n                self.aer = aer.Aer\n            except ImportError as exc:\n                raise ImportError('Could not import the Aer provider from the '\n                                  'qiskit-aer package. Install qiskit-aer or '\n                                  'check your installation.') from exc\n        return getattr(self.aer, attr)\n\n\nclass IBMQWrapper:\n    \"\"\"Lazy loading wraooer for IBMQ provider.\"\"\"\n\n    def __init__(self):\n        self.ibmq = None\n\n    def __bool__(self):\n        if self.ibmq is None:\n            try:\n                from qiskit.providers import ibmq\n                self.ibmq = ibmq.IBMQ\n            except ImportError:\n                return False\n        return True\n\n    def __getattr__(self, attr):\n        if not self.ibmq:\n            try:\n                from qiskit.providers import ibmq\n                self.ibmq = ibmq.IBMQ\n            except ImportError as exc:\n                raise ImportError('Could not import the IBMQ provider from the '\n                                  'qiskit-ibmq-provider package. Install '\n                                  'qiskit-ibmq-provider or check your  '\n                                  'installation.') from exc\n        return getattr(self.ibmq, attr)\n\n\nAer = AerWrapper()\nIBMQ = IBMQWrapper()",
  "start_line": 1,
  "end_line": 126,
  "total_lines": 126,
  "is_truncated": false
}
Generated tokens 133 tokens · stopped: STOP
This is incredibly frustrating. `from qiskit.circuit import QuantumCircuit` is somehow triggering `import qiskit`. Wait! I know what's happening. `qiskit` is a package. When I do `from qiskit.circuit import QuantumCircuit`, Python first imports `qiskit.__init__`. If `qiskit/__init__.py` has imports that eventually lead to the failing Cython module, it will fail. Let's look at `qiskit/__init__.py`.<channel|><|tool_call>call:read_file{filepath:<|"|>qiskit/__init__.py<|"|>}<tool_call|><|tool_response>
Turn 10at 407 s824 tokens out8,810 prompt tokens
Exactly. Line 53: `from qiskit.execute_function import execute  # noqa`.
And then `qiskit/execute_function.py` imports `qiskit.compiler`, which imports `qiskit.transpiler.passes`, and so on, until it hits the failing Cython module.

To avoid this, I can't just import from `qiskit.circuit`.

I can try to mock `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils` before any other import.

Let's try to do this in the reproduction script.
TOOL CALL · run_command
{
  "command": "bash -c \"cat <<'EOF' > /tmp/repro.py\nimport sys\nfrom unittest.mock import MagicMock\n\n# Mock the problematic Cython module\nmock_utils = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = mock_utils\n\nfrom qiskit.circuit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure\nfrom qiskit.transpiler.passmanager import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f'Number of swap gates remaining after one invocation: {swap_count}')\n\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}')\nEOF\npython3 /tmp/repro.py\""
}
Result of run_command 5,051 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 8, in <module>\n    from qiskit.circuit import QuantumCircuit\n  File \"/qiskit-terra/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/qiskit-terra/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/qiskit-terra/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/qiskit-terra/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 29, in <module>\n    from .cython.stochastic_swap.swap_trial import swap_trial\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'\n",
  "details": {
    "stdout": "",
    "stderr": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 8, in <module>\n    from qiskit.circuit import QuantumCircuit\n  File \"/qiskit-terra/qiskit/__init__.py\", line 53, in <module>\n    from qiskit.execute_function import execute  # noqa\n  File \"/qiskit-terra/qiskit/execute_function.py\", line 24, in <module>\n    from qiskit.compiler import transpile, assemble, schedule\n  File \"/qiskit-terra/qiskit/compiler/__init__.py\", line 34, in <module>\n    from .transpiler import transpile\n  File \"/qiskit-terra/qiskit/compiler/transpiler.py\", line 35, in <module>\n    from qiskit.transpiler.passes import ApplyLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/__init__.py\", line 126, in <module>\n    from .layout import SetLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/__init__.py\", line 19, in <module>\n    from .sabre_layout import SabreLayout\n  File \"/qiskit-terra/qiskit/transpiler/passes/layout/sabre_layout.py\", line 24, in <module>\n    from qiskit.transpiler.passes.routing import SabreSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/__init__.py\", line 18, in <module>\n    from .stochastic_swap import StochasticSwap\n  File \"/qiskit-terra/qiskit/transpiler/passes/routing/stochastic_swap.py\", line 29, in <module>\n    from .cython.stochastic_swap.swap_trial import swap_trial\nModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'\n",
    "exit_code": 1
  }
}
Generated tokens 824 tokens · stopped: STOP
Exactly. Line 53: `from qiskit.execute_function import execute # noqa`. And then `qiskit/execute_function.py` imports `qiskit.compiler`, which imports `qiskit.transpiler.passes`, and so on, until it hits the failing Cython module. To avoid this, I can't just import from `qiskit.circuit`. I can try to mock `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils` before any other import. Let's try to do this in the reproduction script. <channel|><|tool_call>call:run_command{command:<|"|>bash -c "cat <<'EOF' > /tmp/repro.py import sys from unittest.mock import MagicMock # Mock the problematic Cython module mock_utils = MagicMock() sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = mock_utils from qiskit.circuit import QuantumCircuit from qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure from qiskit.transpiler.passmanager import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f'Number of swap gates remaining after one invocation: {swap_count}') current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}') EOF python3 /tmp/repro.py"<|"|>}<tool_call|><|tool_response>
Turn 11at 435 s834 tokens out11,307 prompt tokens
Okay, it seems `qiskit.transpiler.passes.routing.cython.stochastic_swap` has multiple modules.
I'll just mock the whole `qiskit.transpiler.passes.routing.cython` package.
TOOL CALL · run_command
{
  "command": "bash -c \"cat <<'EOF' > /tmp/repro.py\nimport sys\nfrom unittest.mock import MagicMock\n\n# Mock the problematic Cython packages\nmock_cython = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython'] = mock_cython\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = mock_cython\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = mock_cython\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = mock_cython\n\nfrom qiskit.circuit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure\nfrom qiskit.transpiler.passmanager import PassManager\n\ncirc = QuantumCircuit(8, 8)\ncirc.swap(3, 4)\ncirc.swap(6, 7)\ncirc.swap(0, 1)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(3, 4)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(0, 1)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(6, 7)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(3, 4)\ncirc.swap(3, 4)\ncirc.swap(5, 6)\ncirc.swap(1, 2)\ncirc.swap(4, 5)\ncirc.swap(2, 3)\ncirc.swap(5, 6)\ncirc.measure(range(8), range(8))\n\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nswap_count = 0\nfor instruction in result.data:\n    if instruction.operation.name == 'swap':\n        swap_count += 1\n\nprint(f'Number of swap gates remaining after one invocation: {swap_count}')\n\ncurrent_circ = circ\niteration = 0\nwhile True:\n    iteration += 1\n    pm_loop = PassManager()\n    pm_loop.append(OptimizeSwapBeforeMeasure())\n    next_circ = pm_loop.run(current_circ)\n    \n    curr_swaps = 0\n    for inst in current_circ.data:\n        if inst.operation.name == 'swap': curr_swaps += 1\n    next_swaps = 0\n    for inst in next_circ.data:\n        if inst.operation.name == 'swap': next_swaps += 1\n        \n    if next_swaps == curr_swaps:\n        break\n    current_circ = next_circ\n\nprint(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}')\nEOF\npython3 /tmp/repro.py\""
}
Result of run_command 2,507 characters
{
  "status": "error",
  "error_type": "CommandError",
  "error_message": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 49, in <module>\n    if instruction.operation.name == 'swap':\nAttributeError: 'tuple' object has no attribute 'operation'\n",
  "details": {
    "stdout": "",
    "stderr": "/qiskit-terra/qiskit/circuit/equivalence.py:18: DeprecationWarning: The retworkx package is deprecated and has been renamed to rustworkx. Rustworkx is a drop-in replacement and can be used by replacing `import retworkx` with import `rustworkx`. \n  import retworkx as rx\n/qiskit-terra/qiskit/quantum_info/operators/operator.py:424: DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed. __array__ must implement 'dtype' and 'copy' keyword arguments. To learn more, see the migration guide https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword\n  return Operator(np.array(instruction, dtype=complex))\n/qiskit-terra/qiskit/version.py:20: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.\n  import pkg_resources\nTraceback (most recent call last):\n  File \"/tmp/repro.py\", line 49, in <module>\n    if instruction.operation.name == 'swap':\nAttributeError: 'tuple' object has no attribute 'operation'\n",
    "exit_code": 1
  }
}
Generated tokens 834 tokens · stopped: STOP
Okay, it seems `qiskit.transpiler.passes.routing.cython.stochastic_swap` has multiple modules. I'll just mock the whole `qiskit.transpiler.passes.routing.cython` package. <channel|><|tool_call>call:run_command{command:<|"|>bash -c "cat <<'EOF' > /tmp/repro.py import sys from unittest.mock import MagicMock # Mock the problematic Cython packages mock_cython = MagicMock() sys.modules['qiskit.transpiler.passes.routing.cython'] = mock_cython sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = mock_cython sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = mock_cython sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = mock_cython from qiskit.circuit import QuantumCircuit from qiskit.transpiler.passes.optimization import OptimizeSwapBeforeMeasure from qiskit.transpiler.passmanager import PassManager circ = QuantumCircuit(8, 8) circ.swap(3, 4) circ.swap(6, 7) circ.swap(0, 1) circ.swap(6, 7) circ.swap(4, 5) circ.swap(0, 1) circ.swap(5, 6) circ.swap(3, 4) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(0, 1) circ.swap(5, 6) circ.swap(1, 2) circ.swap(6, 7) circ.swap(4, 5) circ.swap(2, 3) circ.swap(3, 4) circ.swap(3, 4) circ.swap(5, 6) circ.swap(1, 2) circ.swap(4, 5) circ.swap(2, 3) circ.swap(5, 6) circ.measure(range(8), range(8)) pm = PassManager() pm.append(OptimizeSwapBeforeMeasure()) result = pm.run(circ) swap_count = 0 for instruction in result.data: if instruction.operation.name == 'swap': swap_count += 1 print(f'Number of swap gates remaining after one invocation: {swap_count}') current_circ = circ iteration = 0 while True: iteration += 1 pm_loop = PassManager() pm_loop.append(OptimizeSwapBeforeMeasure()) next_circ = pm_loop.run(current_circ) curr_swaps = 0 for inst in current_circ.data: if inst.operation.name == 'swap': curr_swaps += 1 next_swaps = 0 for inst in next_circ.data: if inst.operation.name == 'swap': next_swaps += 1 if next_swaps == curr_swaps: break current_circ = next_circ print(f'Number of swap gates remaining after {iteration} iterations: {next_swaps}') EOF python3 /tmp/repro.py"<|"|>}<tool_call|><|tool_response>

Patch, tests and logs

Final code change Included
Test output Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
Test errors Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
Test report (JUnit) Missing
Not saved for this rollout. Nothing has been inferred or reconstructed.
Agent log Included
  [   0.0s] 📋 System Prompt: You are a principal Python software engineer resolving a repository issue in `/workspace`.
  [   0.0s] 🎯 Task Prompt: You are evaluating a software engineering task for repository Qiskit/qiskit-terra.
  [  14.6s] 💭 (633 chars) "The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit.
The pass is supposed to move SWAP ga..."
  [  14.6s] 🔧 run_command grep -rn --include="*.py" "OptimizeSwapBeforeMeasure" | grep "class OptimizeSwap
  [  14.6s]   → qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py:22:class 
OptimizeSwapBeforeMeasure(TransformationP
  [  70.3s] 💭 (221 chars) "Okay, the class is located in 
`qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`.
Now, I'll create ..."
  [  70.3s] 🔧 run_command (85 lines) cat <<'PY' > /tmp/repro.py
  [  70.4s]   🔧 
  [ 104.4s] 💭 (334 chars) "Ah, I had a syntax error in the `cat` command (missing closing `PY` or something). Let me 
try again and be more careful ..."
  [ 104.4s] 📝 write_file (/tmp/repro.py, 70 lines)
  [ 104.5s]   ❌ {'status': 'error', 'error_type': 'FileWriteError', 'error_message': "Path traversal detected: 
'/tmp/repro.py' escapes w…
  [ 135.2s] 💭 (352 chars) "I forgot that I cannot write to `/tmp` using `write_file`. I must write to the workspace. 
But waiting, the rule says: "N..."
  [ 135.2s] 🔧 run_command (66 lines) python3 - <<'PY'
  [ 137.8s]   → error (exit 0): 
  [ 193.4s] 💭 (1575 chars) "It seems like there is a `ModuleNotFoundError` related to cython modules. This is strange 
for the environment.
`ModuleNo..."
  [ 193.4s] 🔧 run_command (65 lines) python3 - <<'PY'
  [ 195.0s]   → error (exit 0): 
  [ 205.7s] 💭 (479 chars) "It seems `from qiskit.transpiler import PassManager` is still triggering the import of 
`qiskit/__init__.py`.
Wait, look ..."
  [ 205.7s] 🔧 run_command grep -rn --include="*.py" "class PassManager" qiskit/transpiler
  [ 205.7s]   → qiskit/transpiler/passmanager.py:27:class PassManager:
  [ 229.0s] 💭 (40 chars) "Okay, let's try to import it from there."
  [ 229.0s] 🔧 run_command (65 lines) python3 - <<'PY'
  [ 230.6s]   → error (exit 0): 
  [ 288.9s] 💭 (1208 chars) "Wait, it's still importing `qiskit/__init__.py`. This is very strange.
Where could it be coming from?
Maybe `from qiskit..."
  [ 288.9s] 🔧 run_command (66 lines) bash -c "cat <<'EOF' > /tmp/repro.py
  [ 290.7s]   → error (exit 0): 
  [ 359.9s] 💭 (403 chars) "This is incredibly frustrating. `from qiskit.circuit import QuantumCircuit` is somehow 
triggering `import qiskit`.

Wait..."
  [ 359.9s] 📖 read_file (qiskit/__init__.py)
  [ 360.0s]   ✓ {'status': 'ok', 'filepath': 'qiskit/__init__.py', 'content': '# This code is part of Qiskit.\n#\n# (C) 
Copyright IBM 20…
  [ 388.6s] 💭 (448 chars) "Exactly. Line 53: `from qiskit.execute_function import execute  # noqa`.
And then `qiskit/execute_function.py` imports `..."
  [ 388.6s] 🔧 run_command (73 lines) bash -c "cat <<'EOF' > /tmp/repro.py
  [ 390.2s]   → error (exit 0): 
  [ 417.3s] 💭 (170 chars) "Okay, it seems `qiskit.transpiler.passes.routing.cython.stochastic_swap` has multiple 
modules.
I'll just mock the whole ..."
  [ 417.3s] 🔧 run_command (76 lines) bash -c "cat <<'EOF' > /tmp/repro.py
  [ 419.0s]   → error (exit 0): 
Native result row
{
  "agent_error": "Agent exceeded session timeout (7.5 min)",
  "duration_seconds": 470.74,
  "error": "Empty agent patch",
  "grade": {
    "error": "Empty agent patch",
    "resolved": false,
    "strict_clean_patch": false,
    "test_exit_code": -1
  },
  "instance_id": "qiskit__qiskit-terra-5833",
  "pass_idx": 0,
  "patch_chars": 0,
  "phase1_seconds": 470.73,
  "repo": "Qiskit/qiskit-terra",
  "request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/qiskit__qiskit-terra-5833__p0__r1.jsonl",
  "resolved": false,
  "rollout_idx": 1,
  "run_key": "qiskit__qiskit-terra-5833__p0__r1",
  "strict_clean_patch": false,
  "tool_calls": 11,
  "total_llm_calls": 11,
  "trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_qiskit__qiskit-terra-5833__p0__r1.json"
}