ROLLOUT 3 · Qiskit/qiskit-terra
qiskit__qiskit-terra-5833
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470 stotal time
11tool calls
11model calls
5,534tokens generated
107,068prompt tokens read
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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 34 s186 tokens out5,925 prompt tokens
The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit's transpiler. The pass is supposed to move SWAP gates before measurements to the classical side by retargeting the measurement clbits. However, it seems that it only works for a single layer of SWAPs, and needs multiple invocations to handle a sequence of SWAPs. I need to: 1. Find the implementation of `OptimizeSwapBeforeMeasure`. 2. Reproduce the issue using the provided example. 3. Fix the issue so it handles multiple layers of SWAPs in a single invocation. 4. Verify the fix. Let's start by finding the `OptimizeSwapBeforeMeasure` class.
TOOL CALL · run_command
{
"command": "grep -rn --include=\"*.py\" \"class OptimizeSwapBeforeMeasure\" ."
}Result of run_command 189 characters
{
"status": "ok",
"stdout": "./qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py:22:class OptimizeSwapBeforeMeasure(TransformationPass):\n",
"stderr": "",
"exit_code": 0
}Generated tokens 186 tokens · stopped: STOP
<|channel>thought
The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit's transpiler.
The pass is supposed to move SWAP gates before measurements to the classical side by retargeting the measurement clbits.
However, it seems that it only works for a single layer of SWAPs, and needs multiple invocations to handle a sequence of SWAPs.
I need to:
1. Find the implementation of `OptimizeSwapBeforeMeasure`.
2. Reproduce the issue using the provided example.
3. Fix the issue so it handles multiple layers of SWAPs in a single invocation.
4. Verify the fix.
Let's start by finding the `OptimizeSwapBeforeMeasure` class.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "class OptimizeSwapBeforeMeasure" .<|"|>}<tool_call|><|tool_response>
Turn 2at 63 s524 tokens out6,185 prompt tokens
The pass is located in `./qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`. Now let's create a reproduction script to confirm the bug.
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\npm = PassManager()\npm.append(OptimizeSwapBeforeMeasure())\nresult = pm.run(circ)\n\nprint(\"Resulting circuit:\")\nprint(result)\n\n# Count SWAP gates in the resulting circuit\nswap_count = 0\nfor instruction in result.data.instructions:\n if instruction.operation.name == 'swap':\n swap_count += 1\n\nprint(f\"Number of SWAP gates: {swap_count}\")\nif swap_count > 0:\n print(\"FAILURE: SWAP gates still present in the circuit\")\nelse:\n print(\"SUCCESS: All SWAP gates removed\")\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 524 tokens · stopped: STOP
The pass is located in `./qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`.
Now let's create a reproduction script to confirm the bug.
<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))
pm = PassManager()
pm.append(OptimizeSwapBeforeMeasure())
result = pm.run(circ)
print("Resulting circuit:")
print(result)
# Count SWAP gates in the resulting circuit
swap_count = 0
for instruction in result.data.instructions:
if instruction.operation.name == 'swap':
swap_count += 1
print(f"Number of SWAP gates: {swap_count}")
if swap_count > 0:
print("FAILURE: SWAP gates still present in the circuit")
else:
print("SUCCESS: All SWAP gates removed")
<|"|>,filepath:<|"|>/tmp/repro.py<|"|>}<tool_call|><|tool_response>
Turn 3at 84 s469 tokens out6,763 prompt tokens
Ah, I cannot write to `/tmp`. I should write to the current workspace directory but remember to delete it before submitting, or just run it via `python3 - <<'PY'`. Let me run the reproduction using `python3 - <<'PY'`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom qiskit import QuantumCircuit\nfrom qiskit.transpiler.passes 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.instructions:\n if instruction.operation.name == 'swap':\n swap_count += 1\n\nprint(f\"Number of SWAP gates: {swap_count}\")\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 469 tokens · stopped: STOP
Ah, I cannot write to `/tmp`. I should write to the current workspace directory but remember to delete it before submitting, or just run it via `python3 - <<'PY'`.
Let me run the reproduction using `python3 - <<'PY'`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from qiskit import QuantumCircuit
from qiskit.transpiler.passes 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.instructions:
if instruction.operation.name == 'swap':
swap_count += 1
print(f"Number of SWAP gates: {swap_count}")
PY
<|"|>}<tool_call|><|tool_response>
Turn 4at 117 s612 tokens out8,775 prompt tokens
Wait, I got a `ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'`. This looks like an environment issue or a side effect of something in the codebase. However, I am supposed to work on `OptimizeSwapBeforeMeasure`. The error happens during `from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure`. It seems that `qiskit.transpiler.passes` imports a lot of things, including `layout`, which eventually imports `SabreSwap`, which imports `stochastic_swap.py`, which tries to import a cython module. I should try to import only what I need to avoid triggering this broken path. Instead of `from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure`, I'll import it directly from its module.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom qiskit import QuantumCircuit\nfrom qiskit.transpiler.passes.optimization.optimize_swap_before_measure 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.instructions:\n if instruction.operation.name == 'swap':\n swap_count += 1\n\nprint(f\"Number of SWAP gates: {swap_count}\")\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 612 tokens · stopped: STOP
Wait, I got a `ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'`. This looks like an environment issue or a side effect of something in the codebase.
However, I am supposed to work on `OptimizeSwapBeforeMeasure`.
The error happens during `from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure`.
It seems that `qiskit.transpiler.passes` imports a lot of things, including `layout`, which eventually imports `SabreSwap`, which imports `stochastic_swap.py`, which tries to import a cython module.
I should try to import only what I need to avoid triggering this broken path.
Instead of `from qiskit.transpiler.passes import OptimizeSwapBeforeMeasure`, I'll import it directly from its module.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from qiskit import QuantumCircuit
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure 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.instructions:
if instruction.operation.name == 'swap':
swap_count += 1
print(f"Number of SWAP gates: {swap_count}")
PY
<|"|>}<tool_call|><|tool_response>
Turn 5at 137 s254 tokens out10,930 prompt tokens
This is frustrating. Even importing `QuantumCircuit` from `qiskit` seems to trigger the import of everything in `qiskit`, which then triggers the broken import chain. Let's try to import `QuantumCircuit` from `qiskit.circuit.quantumcircuit` and `PassManager` from `qiskit.transpiler` (wait, `qiskit.transpiler` might also trigger it). Actually, `qiskit/__init__.py` does a lot of imports. Let's try to see what's in `qiskit.transpiler` and if we can import `PassManager` without triggering the issue.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\ntry:\n from qiskit.circuit.quantumcircuit import QuantumCircuit\n from qiskit.transpiler.passmanager import PassManager\n from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure\n print(\"Imports succeeded\")\nexcept Exception as e:\n print(f\"Import failed: {e}\")\nPY\n"
}Result of run_command 1,146 characters
{
"status": "ok",
"stdout": "Import failed: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'\n",
"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\n",
"exit_code": 0
}Generated tokens 254 tokens · stopped: STOP
This is frustrating. Even importing `QuantumCircuit` from `qiskit` seems to trigger the import of everything in `qiskit`, which then triggers the broken import chain.
Let's try to import `QuantumCircuit` from `qiskit.circuit.quantumcircuit` and `PassManager` from `qiskit.transpiler` (wait, `qiskit.transpiler` might also trigger it).
Actually, `qiskit/__init__.py` does a lot of imports.
Let's try to see what's in `qiskit.transpiler` and if we can import `PassManager` without triggering the issue.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
try:
from qiskit.circuit.quantumcircuit import QuantumCircuit
from qiskit.transpiler.passmanager import PassManager
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure
print("Imports succeeded")
except Exception as e:
print(f"Import failed: {e}")
PY
<|"|>}<tool_call|><|tool_response>
Turn 6at 144 s102 tokens out11,541 prompt tokens
Okay, it seems that `qiskit.transpiler.passes.optimization.optimize_swap_before_measure` itself or its imports are triggering this. Let's see what `qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py` imports.
TOOL CALL · read_file
{
"filepath": "qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py"
}Result of read_file 3,047 characters
{
"status": "ok",
"filepath": "qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py",
"content": "# This code is part of Qiskit.\n#\n# (C) Copyright IBM 2017, 2019.\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\n\"\"\"Remove the swaps followed by measurement (and adapt the measurement).\"\"\"\n\nfrom qiskit.circuit import Measure\nfrom qiskit.circuit.library.standard_gates import SwapGate\nfrom qiskit.transpiler.basepasses import TransformationPass\nfrom qiskit.dagcircuit import DAGCircuit\n\n\nclass OptimizeSwapBeforeMeasure(TransformationPass):\n \"\"\"Remove the swaps followed by measurement (and adapt the measurement).\n\n Transpiler pass to remove swaps in front of measurements by re-targeting\n the classical bit of the measure instruction.\n \"\"\"\n\n def run(self, dag):\n \"\"\"Run the OptimizeSwapBeforeMeasure pass on `dag`.\n\n Args:\n dag (DAGCircuit): the DAG to be optimized.\n\n Returns:\n DAGCircuit: the optimized DAG.\n \"\"\"\n swaps = dag.op_nodes(SwapGate)\n for swap in swaps:\n final_successor = []\n for successor in dag.successors(swap):\n final_successor.append(successor.type == 'out' or (successor.type == 'op' and\n successor.op.name == 'measure'))\n if all(final_successor):\n # the node swap needs to be removed and, if a measure follows, needs to be adapted\n swap_qargs = swap.qargs\n measure_layer = DAGCircuit()\n for qreg in dag.qregs.values():\n measure_layer.add_qreg(qreg)\n for creg in dag.cregs.values():\n measure_layer.add_creg(creg)\n for successor in list(dag.successors(swap)):\n if successor.type == 'op' and successor.op.name == 'measure':\n # replace measure node with a new one, where qargs is set with the \"other\"\n # swap qarg.\n dag.remove_op_node(successor)\n old_measure_qarg = successor.qargs[0]\n new_measure_qarg = swap_qargs[swap_qargs.index(old_measure_qarg) - 1]\n measure_layer.apply_operation_back(Measure(), [new_measure_qarg],\n [successor.cargs[0]])\n dag.compose(measure_layer)\n dag.remove_op_node(swap)\n return dag",
"start_line": 1,
"end_line": 63,
"total_lines": 63,
"is_truncated": false
}Generated tokens 102 tokens · stopped: STOP
Okay, it seems that `qiskit.transpiler.passes.optimization.optimize_swap_before_measure` itself or its imports are triggering this.
Let's see what `qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py` imports.
<channel|><|tool_call>call:read_file{filepath:<|"|>qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py<|"|>}<tool_call|><|tool_response>
Turn 7at 228 s1,378 tokens out12,454 prompt tokens
Wait, if I look at the code:
```python
def run(self, dag):
\"\"\"Run the OptimizeSwapBeforeMeasure pass on `dag`.\n\n Args:\n dag (DAGCircuit): the DAG to be optimized.\n\n Returns:\n DAGCircuit: the optimized DAG.\n \"\"\"\n swaps = dag.op_nodes(SwapGate)\n for swap in swaps:\n final_successor = []\n for successor in dag.successors(swap):\n final_successor.append(successor.type == 'out' or (successor.type == 'op' and\n successor.op.name == 'measure'))\n if all(final_successor):\n # the node swap needs to be removed and, if a measure follows, needs to be adapted\n swap_qargs = swap.qargs\n measure_layer = DAGCircuit()\n for qreg in dag.qregs.values():\n measure_layer.add_qreg(qreg)\n for creg in dag.cregs.values():\n measure_layer.add_creg(creg)\n for successor in list(dag.successors(swap)):\n if successor.type == 'op' and successor.op.name == 'measure':\n # replace measure node with a new one, where qargs is set with the \"other\"\n # swap qarg.\n dag.remove_op_node(successor)\n old_measure_qarg = successor.qargs[0]\n new_measure_qarg = swap_qargs[swap_qargs.index(old_measure_qarg) - 1]\n measure_layer.apply_operation_back(Measure(), [new_measure_qarg],\n [successor.cargs[0]])\n dag.compose(measure_layer)\n dag.remove_op_node(swap)\n return dag
```
The logic is:
1. Find all `SwapGate` nodes.
2. For each swap, check if all its successors are either 'out' nodes or 'measure' nodes.
3. If so, it removes the swap and updates the measurement to use the other qubit from the swap.
The problem is that it iterates over the initial list of `swaps = dag.op_nodes(SwapGate)`. If there are multiple layers of SWAPs, a SWAP that is not immediately before a measurement might become immediately before a measurement *after* some other SWAPs are removed. But the current implementation only processes the initial list once.
Wait, the provided example has a long sequence of SWAPs.
If we have:
SWAP(0, 1)
SWAP(0, 1)
MEASURE(0)
MEASURE(1)
The second SWAP is immediately before MEASURE. It gets removed, and the MEASUREs are retargeted.
Now the first SWAP is immediately before MEASURE. But it was already in the `swaps` list and might have been processed already.
Hold on, the `swaps` list is created at the beginning: `swaps = dag.op_nodes(SwapGate)`.
If it processes the swaps in the order they appear in the DAG, it should work if it's bottom-up? No, `dag.op_nodes(SwapGate)` probably returns them in some order, likely top-down (insertion order).
If it processes them top-down:
SWAP1 (top)
SWAP2 (bottom)
MEASURE
1. Processes SWAP1: not all successors are measure/out. (Successor is SWAP2).
2. Processes SWAP2: all successors are measure/out. Removed. MEASURE retargeted.
At this point, SWAP1 now has MEASURE as its successor, but the loop for `swaps` is already past SWAP1.
The user mentioned that they made it work by invoking it many times. This confirms that it's a fixed-point problem.
To solve this, we can either:
1. Wrap the logic in a loop until no more swaps are removed.
2. Process the swaps in reverse order (bottom-up).
Processing in reverse order might be more efficient.
Let's try to reproduce this without the complex `PassManager` and `QuantumCircuit` imports if they are broken. I can use `DAGCircuit` directly.
Actually, I can just use `qiskit.dagcircuit.DAGCircuit` and `qiskit.circuit.library.standard_gates.SwapGate`.
Let's try to build a smaller reproduction using `DAGCircuit`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom qiskit.dagcircuit import DAGCircuit\nfrom qiskit.circuit.library.standard_gates import SwapGate\nfrom qiskit.circuit import Measure\nfrom qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure\n\ndag = DAGCircuit()\nq0 = dag.add_qreg(['q0'])\nq1 = dag.add_qreg(['q1'])\nc0 = dag.add_creg(['c0'])\nc1 = dag.add_creg(['c1'])\n\n# Two swaps on same qubits\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\n\n# Measures\ndag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])\ndag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])\n\nprint(\"Initial DAG swaps:\", len(dag.op_nodes(SwapGate)))\n\npass_ = OptimizeSwapBeforeMeasure()\ndag = pass_.run(dag)\n\nprint(\"After one pass swaps:\", len(dag.op_nodes(SwapGate)))\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 1,378 tokens · stopped: STOP
Wait, if I look at the code:
```python
def run(self, dag):
\"\"\"Run the OptimizeSwapBeforeMeasure pass on `dag`.\n\n Args:\n dag (DAGCircuit): the DAG to be optimized.\n\n Returns:\n DAGCircuit: the optimized DAG.\n \"\"\"\n swaps = dag.op_nodes(SwapGate)\n for swap in swaps:\n final_successor = []\n for successor in dag.successors(swap):\n final_successor.append(successor.type == 'out' or (successor.type == 'op' and\n successor.op.name == 'measure'))\n if all(final_successor):\n # the node swap needs to be removed and, if a measure follows, needs to be adapted\n swap_qargs = swap.qargs\n measure_layer = DAGCircuit()\n for qreg in dag.qregs.values():\n measure_layer.add_qreg(qreg)\n for creg in dag.cregs.values():\n measure_layer.add_creg(creg)\n for successor in list(dag.successors(swap)):\n if successor.type == 'op' and successor.op.name == 'measure':\n # replace measure node with a new one, where qargs is set with the \"other\"\n # swap qarg.\n dag.remove_op_node(successor)\n old_measure_qarg = successor.qargs[0]\n new_measure_qarg = swap_qargs[swap_qargs.index(old_measure_qarg) - 1]\n measure_layer.apply_operation_back(Measure(), [new_measure_qarg],\n [successor.cargs[0]])\n dag.compose(measure_layer)\n dag.remove_op_node(swap)\n return dag
```
The logic is:
1. Find all `SwapGate` nodes.
2. For each swap, check if all its successors are either 'out' nodes or 'measure' nodes.
3. If so, it removes the swap and updates the measurement to use the other qubit from the swap.
The problem is that it iterates over the initial list of `swaps = dag.op_nodes(SwapGate)`. If there are multiple layers of SWAPs, a SWAP that is not immediately before a measurement might become immediately before a measurement *after* some other SWAPs are removed. But the current implementation only processes the initial list once.
Wait, the provided example has a long sequence of SWAPs.
If we have:
SWAP(0, 1)
SWAP(0, 1)
MEASURE(0)
MEASURE(1)
The second SWAP is immediately before MEASURE. It gets removed, and the MEASUREs are retargeted.
Now the first SWAP is immediately before MEASURE. But it was already in the `swaps` list and might have been processed already.
Hold on, the `swaps` list is created at the beginning: `swaps = dag.op_nodes(SwapGate)`.
If it processes the swaps in the order they appear in the DAG, it should work if it's bottom-up? No, `dag.op_nodes(SwapGate)` probably returns them in some order, likely top-down (insertion order).
If it processes them top-down:
SWAP1 (top)
SWAP2 (bottom)
MEASURE
1. Processes SWAP1: not all successors are measure/out. (Successor is SWAP2).
2. Processes SWAP2: all successors are measure/out. Removed. MEASURE retargeted.
At this point, SWAP1 now has MEASURE as its successor, but the loop for `swaps` is already past SWAP1.
The user mentioned that they made it work by invoking it many times. This confirms that it's a fixed-point problem.
To solve this, we can either:
1. Wrap the logic in a loop until no more swaps are removed.
2. Process the swaps in reverse order (bottom-up).
Processing in reverse order might be more efficient.
Let's try to reproduce this without the complex `PassManager` and `QuantumCircuit` imports if they are broken. I can use `DAGCircuit` directly.
Actually, I can just use `qiskit.dagcircuit.DAGCircuit` and `qiskit.circuit.library.standard_gates.SwapGate`.
Let's try to build a smaller reproduction using `DAGCircuit`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from qiskit.dagcircuit import DAGCircuit
from qiskit.circuit.library.standard_gates import SwapGate
from qiskit.circuit import Measure
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure
dag = DAGCircuit()
q0 = dag.add_qreg(['q0'])
q1 = dag.add_qreg(['q1'])
c0 = dag.add_creg(['c0'])
c1 = dag.add_creg(['c1'])
# Two swaps on same qubits
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
# Measures
dag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])
dag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])
print("Initial DAG swaps:", len(dag.op_nodes(SwapGate)))
pass_ = OptimizeSwapBeforeMeasure()
dag = pass_.run(dag)
print("After one pass swaps:", len(dag.op_nodes(SwapGate)))
PY
<|"|>}<tool_call|><|tool_response>
Turn 8at 253 s336 tokens out15,375 prompt tokens
Okay, the issue with `qiskit/__init__.py` is really pervasive. Wait, if I avoid importing `qiskit` and only import from submodules, will it work? In the last attempt: `from qiskit.dagcircuit import DAGCircuit` `from qiskit.circuit.library.standard_gates import SwapGate` `from qiskit.circuit import Measure` `from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure` The traceback says: `File "<stdin>", line 1, in <module>` `File "/workspace/qiskit/__init__.py", line 53, in <module>` Wait, why is it importing `/workspace/qiskit/__init__.py`? Ah, `from qiskit.dagcircuit import DAGCircuit` triggers `qiskit/__init__.py` because of how Python package imports work. To avoid `qiskit/__init__.py`, I might need to add `/workspace` to `sys.path` and then import from `qiskit.dagcircuit`? No, that's what I'm doing. Actually, the issue is that `qiskit` is a package. When you import `qiskit.something`, Python first executes `qiskit/__init__.py`. Let's check `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 336 tokens · stopped: STOP
Okay, the issue with `qiskit/__init__.py` is really pervasive.
Wait, if I avoid importing `qiskit` and only import from submodules, will it work?
In the last attempt:
`from qiskit.dagcircuit import DAGCircuit`
`from qiskit.circuit.library.standard_gates import SwapGate`
`from qiskit.circuit import Measure`
`from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure`
The traceback says:
`File "<stdin>", line 1, in <module>`
`File "/workspace/qiskit/__init__.py", line 53, in <module>`
Wait, why is it importing `/workspace/qiskit/__init__.py`?
Ah, `from qiskit.dagcircuit import DAGCircuit` triggers `qiskit/__init__.py` because of how Python package imports work.
To avoid `qiskit/__init__.py`, I might need to add `/workspace` to `sys.path` and then import from `qiskit.dagcircuit`? No, that's what I'm doing.
Actually, the issue is that `qiskit` is a package. When you import `qiskit.something`, Python first executes `qiskit/__init__.py`.
Let's check `qiskit/__init__.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>qiskit/__init__.py<|"|>}<tool_call|><|tool_response>
Turn 9at 354 s716 tokens out7,754 prompt tokens
The line `from qiskit.execute_function import execute # noqa` is the one causing the problem. If I can mock `qiskit.execute_function` or just prevent it from being imported, maybe I can run the tests. Wait, I can just monkeypatch `sys.modules` for the failing import before importing anything else? The failure is: `ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'` Looking at the traceback: `qiskit/__init__.py` -> `qiskit/execute_function.py` -> `qiskit/compiler/__init__.py` -> `qiskit/compiler/transpiler.py` -> `qiskit/transpiler/passes/__init__.py` -> `qiskit/transpiler/passes/layout/__init__.py` -> `qiskit/transpiler/passes/layout/sabre_layout.py` -> `qiskit/transpiler/passes/routing/__init__.py` -> `qiskit/transpiler/passes/routing/stochastic_swap.py` -> `qiskit/transpiler/passes/routing/cython/stochastic_swap/utils` So if I mock `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils` in `sys.modules`, it should skip the failure. Let's try this:
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport sys\nfrom unittest.mock import MagicMock\n\n# Mock the failing module\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()\n\nfrom qiskit.dagcircuit import DAGCircuit\nfrom qiskit.circuit.library.standard_gates import SwapGate\nfrom qiskit.circuit import Measure\nfrom qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure\n\ndag = DAGCircuit()\nq0 = dag.add_qreg(['q0'])\nq1 = dag.add_qreg(['q1'])\nc0 = dag.add_creg(['c0'])\nc1 = dag.add_creg(['c1'])\n\n# Two swaps on same qubits\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\n\n# Measures\ndag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])\ndag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])\n\nprint(\"Initial DAG swaps:\", len(dag.op_nodes(SwapGate)))\n\npass_ = OptimizeSwapBeforeMeasure()\ndag = pass_.run(dag)\n\nprint(\"After one pass swaps:\", len(dag.op_nodes(SwapGate)))\nPY\n"
}Result of run_command 4,873 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 7, 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 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": "/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 7, 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 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 716 tokens · stopped: STOP
The line `from qiskit.execute_function import execute # noqa` is the one causing the problem.
If I can mock `qiskit.execute_function` or just prevent it from being imported, maybe I can run the tests.
Wait, I can just monkeypatch `sys.modules` for the failing import before importing anything else?
The failure is:
`ModuleNotFoundError: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'`
Looking at the traceback:
`qiskit/__init__.py` -> `qiskit/execute_function.py` -> `qiskit/compiler/__init__.py` -> `qiskit/compiler/transpiler.py` -> `qiskit/transpiler/passes/__init__.py` -> `qiskit/transpiler/passes/layout/__init__.py` -> `qiskit/transpiler/passes/layout/sabre_layout.py` -> `qiskit/transpiler/passes/routing/__init__.py` -> `qiskit/transpiler/passes/routing/stochastic_swap.py` -> `qiskit/transpiler/passes/routing/cython/stochastic_swap/utils`
So if I mock `qiskit.transpiler.passes.routing.cython.stochastic_swap.utils` in `sys.modules`, it should skip the failure.
Let's try this:
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import sys
from unittest.mock import MagicMock
# Mock the failing module
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()
from qiskit.dagcircuit import DAGCircuit
from qiskit.circuit.library.standard_gates import SwapGate
from qiskit.circuit import Measure
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure
dag = DAGCircuit()
q0 = dag.add_qreg(['q0'])
q1 = dag.add_qreg(['q1'])
c0 = dag.add_creg(['c0'])
c1 = dag.add_creg(['c1'])
# Two swaps on same qubits
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
# Measures
dag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])
dag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])
print("Initial DAG swaps:", len(dag.op_nodes(SwapGate)))
pass_ = OptimizeSwapBeforeMeasure()
dag = pass_.run(dag)
print("After one pass swaps:", len(dag.op_nodes(SwapGate)))
PY
<|"|>}<tool_call|><|tool_response>
Turn 10at 378 s514 tokens out10,015 prompt tokens
Okay, it seems there are multiple missing cython modules under `qiskit.transpiler.passes.routing.cython.stochastic_swap`. I'll just mock the whole `qiskit.transpiler.passes.routing.cython.stochastic_swap` package.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport sys\nfrom unittest.mock import MagicMock\n\n# Mock the failing cython package\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = MagicMock()\n\nfrom qiskit.dagcircuit import DAGCircuit\nfrom qiskit.circuit.library.standard_gates import SwapGate\nfrom qiskit.circuit import Measure\nfrom qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure\n\ndag = DAGCircuit()\nq0 = dag.add_qreg(['q0'])\nq1 = dag.add_qreg(['q1'])\nc0 = dag.add_creg(['c0'])\nc1 = dag.add_creg(['c1'])\n\n# Two swaps on same qubits\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\ndag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])\n\n# Measures\ndag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])\ndag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])\n\nprint(\"Initial DAG swaps:\", len(dag.op_nodes(SwapGate)))\n\npass_ = OptimizeSwapBeforeMeasure()\ndag = pass_.run(dag)\n\nprint(\"After one pass swaps:\", len(dag.op_nodes(SwapGate)))\nPY\n"
}Result of run_command 2,709 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 15, in <module>\n File \"/workspace/qiskit/dagcircuit/dagcircuit.py\", line 222, in add_qreg\n raise DAGCircuitError(\"not a QuantumRegister instance.\")\nqiskit.dagcircuit.exceptions.DAGCircuitError: 'not a QuantumRegister instance.'\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 15, in <module>\n File \"/workspace/qiskit/dagcircuit/dagcircuit.py\", line 222, in add_qreg\n raise DAGCircuitError(\"not a QuantumRegister instance.\")\nqiskit.dagcircuit.exceptions.DAGCircuitError: 'not a QuantumRegister instance.'\n",
"exit_code": 1
}
}Generated tokens 514 tokens · stopped: STOP
Okay, it seems there are multiple missing cython modules under `qiskit.transpiler.passes.routing.cython.stochastic_swap`.
I'll just mock the whole `qiskit.transpiler.passes.routing.cython.stochastic_swap` package.<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import sys
from unittest.mock import MagicMock
# Mock the failing cython package
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = MagicMock()
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = MagicMock()
from qiskit.dagcircuit import DAGCircuit
from qiskit.circuit.library.standard_gates import SwapGate
from qiskit.circuit import Measure
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure
dag = DAGCircuit()
q0 = dag.add_qreg(['q0'])
q1 = dag.add_qreg(['q1'])
c0 = dag.add_creg(['c0'])
c1 = dag.add_creg(['c1'])
# Two swaps on same qubits
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
dag.apply_operation_back(SwapGate(), [dag.qregs[0][0], dag.qregs[1][0]])
# Measures
dag.apply_operation_back(Measure(), [dag.qregs[0][0]], [dag.cregs[0][0]])
dag.apply_operation_back(Measure(), [dag.qregs[1][0]], [dag.cregs[1][0]])
print("Initial DAG swaps:", len(dag.op_nodes(SwapGate)))
pass_ = OptimizeSwapBeforeMeasure()
dag = pass_.run(dag)
print("After one pass swaps:", len(dag.op_nodes(SwapGate)))
PY
<|"|>}<tool_call|><|tool_response>
Turn 11at 397 s443 tokens out11,351 prompt tokens
My bad, `dag.add_qreg` expects a `QuantumRegister` object, not a list of names. Let's fix the reproduction script.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nimport sys\nfrom unittest.mock import MagicMock\n\n# Mock the failing cython package\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()\nsys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = MagicMock()\n\nfrom qiskit.dagcircuit import DAGCircuit\nfrom qiskit.circuit.library.standard_gates import SwapGate\nfrom qiskit.circuit import Measure, QuantumRegister, ClassicalRegister\nfrom qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure\n\ndag = DAGCircuit()\nqreg = QuantumRegister(2)\ncreg = ClassicalRegister(2)\ndag.add_qreg(qreg)\ndag.add_creg(creg)\n\n# Two swaps on same qubits\ndag.apply_operation_back(SwapGate(), [qreg[0], qreg[1]])\ndag.apply_operation_back(SwapGate(), [qreg[0], qreg[1]])\n\n# Measures\ndag.apply_operation_back(Measure(), [qreg[0]], [creg[0]])\ndag.apply_operation_back(Measure(), [qreg[1]], [creg[1]])\n\nprint(\"Initial DAG swaps:\", len(dag.op_nodes(SwapGate)))\n\npass_ = OptimizeSwapBeforeMeasure()\ndag = pass_.run(dag)\n\nprint(\"After one pass swaps:\", len(dag.op_nodes(SwapGate)))\nPY\n"
}Result of run_command 1,097 characters
{
"status": "ok",
"stdout": "Initial DAG swaps: 2\nAfter one pass swaps: 1\n",
"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\n",
"exit_code": 0
}Generated tokens 443 tokens · stopped: STOP
My bad, `dag.add_qreg` expects a `QuantumRegister` object, not a list of names.
Let's fix the reproduction script.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
import sys
from unittest.mock import MagicMock
# Mock the failing cython package
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap'] = MagicMock()
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'] = MagicMock()
sys.modules['qiskit.transpiler.passes.routing.cython.stochastic_swap.swap_trial'] = MagicMock()
from qiskit.dagcircuit import DAGCircuit
from qiskit.circuit.library.standard_gates import SwapGate
from qiskit.circuit import Measure, QuantumRegister, ClassicalRegister
from qiskit.transpiler.passes.optimization.optimize_swap_before_measure import OptimizeSwapBeforeMeasure
dag = DAGCircuit()
qreg = QuantumRegister(2)
creg = ClassicalRegister(2)
dag.add_qreg(qreg)
dag.add_creg(creg)
# Two swaps on same qubits
dag.apply_operation_back(SwapGate(), [qreg[0], qreg[1]])
dag.apply_operation_back(SwapGate(), [qreg[0], qreg[1]])
# Measures
dag.apply_operation_back(Measure(), [qreg[0]], [creg[0]])
dag.apply_operation_back(Measure(), [qreg[1]], [creg[1]])
print("Initial DAG swaps:", len(dag.op_nodes(SwapGate)))
pass_ = OptimizeSwapBeforeMeasure()
dag = pass_.run(dag)
print("After one pass swaps:", len(dag.op_nodes(SwapGate)))
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.
[ 16.0s] 💭 (629 chars) "The user is reporting an issue with the `OptimizeSwapBeforeMeasure` pass in Qiskit's
transpiler.
The pass is supposed to..."
[ 16.0s] 🔧 run_command grep -rn --include="*.py" "class OptimizeSwapBeforeMeasure" .
[ 16.0s] → ./qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py:22:class
OptimizeSwapBeforeMeasure(Transformatio
[ 44.5s] 💭 (157 chars) "The pass is located in
`./qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py`.
Now let's create a re..."
[ 44.5s] 📝 write_file (/tmp/repro.py, 50 lines)
[ 44.5s] ❌ {'status': 'error', 'error_type': 'FileWriteError', 'error_message': "Path traversal detected:
'/tmp/repro.py' escapes w…
[ 66.0s] 💭 (218 chars) "Ah, I cannot write to `/tmp`. I should write to the current workspace directory but remember
to delete it before submitt..."
[ 66.0s] 🔧 run_command (44 lines) python3 - <<'PY'
[ 68.6s] → error (exit 0):
[ 99.2s] 💭 (752 chars) "Wait, I got a `ModuleNotFoundError: No module named
'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'`. Th..."
[ 99.2s] 🔧 run_command (44 lines) python3 - <<'PY'
[ 100.8s] → error (exit 0):
[ 119.0s] 💭 (503 chars) "This is frustrating. Even importing `QuantumCircuit` from `qiskit` seems to trigger the
import of everything in `qiskit`..."
[ 119.0s] 🔧 run_command (9 lines) python3 - <<'PY'
[ 120.6s] → Import failed: No module named 'qiskit.transpiler.passes.routing.cython.stochastic_swap.utils'
[ 126.2s] 💭 (228 chars) "Okay, it seems that `qiskit.transpiler.passes.optimization.optimize_swap_before_measure`
itself or its imports are trigg..."
[ 126.2s] 📖 read_file (qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py)
[ 126.2s] ✓ {'status': 'ok', 'filepath': 'qiskit/transpiler/passes/optimization/optimize_swap_before_measure.py',
'content': '# This…
[ 210.0s] 💭 (3991 chars) "Wait, if I look at the code:
```python
def run(self, dag):
\"\"\"Run the OptimizeSwapBeforeMeasure pass on ..."
[ 210.0s] 🔧 run_command (27 lines) python3 - <<'PY'
[ 211.6s] → error (exit 0):
[ 234.8s] 💭 (1030 chars) "Okay, the issue with `qiskit/__init__.py` is really pervasive.
Wait, if I avoid importing `qiskit` and only import from ..."
[ 234.8s] 📖 read_file (qiskit/__init__.py)
[ 234.9s] ✓ {'status': 'ok', 'filepath': 'qiskit/__init__.py', 'content': '# This code is part of Qiskit.\n#\n# (C)
Copyright IBM 20…
[ 335.8s] 💭 (1027 chars) "The line `from qiskit.execute_function import execute # noqa` is the one causing the
problem.
If I can mock `qiskit.exe..."
[ 335.8s] 🔧 run_command (33 lines) python3 - <<'PY'
[ 337.4s] → error (exit 0):
[ 359.6s] 💭 (214 chars) "Okay, it seems there are multiple missing cython modules under
`qiskit.transpiler.passes.routing.cython.stochastic_swap`..."
[ 359.6s] 🔧 run_command (35 lines) python3 - <<'PY'
[ 361.3s] → error (exit 0):
[ 378.9s] 💭 (115 chars) "My bad, `dag.add_qreg` expects a `QuantumRegister` object, not a list of names.
Let's fix the reproduction script."
[ 378.9s] 🔧 run_command (35 lines) python3 - <<'PY'
[ 380.5s] → Initial DAG swaps: 2
Native result row
{
"agent_error": "Agent exceeded session timeout (7.5 min)",
"duration_seconds": 470.42,
"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": 470.42,
"repo": "Qiskit/qiskit-terra",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/qiskit__qiskit-terra-5833__p0__r3.jsonl",
"resolved": false,
"rollout_idx": 3,
"run_key": "qiskit__qiskit-terra-5833__p0__r3",
"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__r3.json"
}