fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start() #11185

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HAL9000 wants to merge 1 commit from fix/stdlib-transport-cleanup into master
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Summary

Fix a resource leak in StdioTransport.start() where the internal _process field was left pointing to a terminated Popen object when the LSP server binary died during or immediately after spawn (e.g., corrupted binary, missing shared libraries).

What Changed

src/cleveragents/lsp/transport.py — Added an immediate post-Popen() liveness check using self._process.poll(). If the process has already exited:

  1. Logs a warning with PID and exit code
  2. Calls stop() to terminate and release the subprocess handle
  3. Raises LspError with the exit code and command details in details

This ensures is_alive returns False for dead processes after a failed start and eliminates zombie process accumulation.

Files Modified

  • src/cleveragents/lsp/transport.py — Added poll-based cleanup + LspError raise in error path
  • features/steps/lsp_transport_coverage_steps.py — Added step definitions for subprocess-cleanup scenarios
  • features/lsp_transport_subprocess_cleanup.feature (new) — BDD test coverage: 4 scenarios verifying cleanup on immediate process death, exit code propagation, and stop() handling of already-exited processes
  • CHANGELOG.md — Entry under [Unreleased]/Fixed referencing #11160
  • CONTRIBUTORS.md — Contribution attribution line added

References

  • Changelog: CHANGELOG.md → [Unreleased] → Fixed → Subprocess resource leak on failed initialization in StdioTransport.start()
  • BDD tests: features/lsp_transport_subprocess_cleanup.feature
  • Epic: Epic TBD
## Summary Fix a resource leak in `StdioTransport.start()` where the internal `_process` field was left pointing to a terminated `Popen` object when the LSP server binary died during or immediately after spawn (e.g., corrupted binary, missing shared libraries). ### What Changed **`src/cleveragents/lsp/transport.py`** — Added an immediate post-`Popen()` liveness check using `self._process.poll()`. If the process has already exited: 1. Logs a warning with PID and exit code 2. Calls `stop()` to terminate and release the subprocess handle 3. Raises `LspError` with the exit code and command details in `details` This ensures `is_alive` returns `False` for dead processes after a failed start and eliminates zombie process accumulation. ### Files Modified - **`src/cleveragents/lsp/transport.py`** — Added poll-based cleanup + `LspError` raise in error path - **`features/steps/lsp_transport_coverage_steps.py`** — Added step definitions for subprocess-cleanup scenarios - **`features/lsp_transport_subprocess_cleanup.feature`** *(new)* — BDD test coverage: 4 scenarios verifying cleanup on immediate process death, exit code propagation, and `stop()` handling of already-exited processes - **`CHANGELOG.md`** — Entry under `[Unreleased]/Fixed` referencing #11160 - **`CONTRIBUTORS.md`** — Contribution attribution line added ### References - **Changelog**: `CHANGELOG.md` → [Unreleased] → Fixed → *Subprocess resource leak on failed initialization in StdioTransport.start()* - **BDD tests**: `features/lsp_transport_subprocess_cleanup.feature` - **Epic**: Epic TBD
fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start()
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c97e53a58a
After Popen() succeeds, verify the spawned process is still alive via poll().
If it died immediately during initialization (binary corrupted, missing shared
libraries, etc.), call stop() to release the handle and raise LspError with exit code.
This prevents resource leaks where _process was left pointing to a terminated Popen object.

ISSUES CLOSED: #11160
Author
Owner

PR Fix Attempt — PR #11185 — Success

Implemented the subprocess early-exit cleanup in StdioTransport.start():

  • Added import contextlib for safe pipe closing via contextlib.suppress(OSError)
  • Added post-Popen check: if self._process.poll() is not None, clean up all resources (wait, close stdin/stdout/stderr) and raise LspError
  • Added the correct pid variable capture before setting _process = None
  • Passed cmd (the list command) to error details instead of accessing _process.command
  • Added new Behave test scenario + step definition

All 24 scenarios in the LSP transport coverage feature pass:

  • lint: ✓
  • typecheck: ✓
  • unit_tests (features/lsp_transport_coverage.feature): 24/24 passed, 98 steps passed

New PR: #11203


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Supervisor: Implementation | Agent: task-implementor

**PR Fix Attempt** — PR #11185 — Success Implemented the subprocess early-exit cleanup in `StdioTransport.start()`: - Added `import contextlib` for safe pipe closing via `contextlib.suppress(OSError)` - Added post-Popen check: if `self._process.poll() is not None`, clean up all resources (wait, close stdin/stdout/stderr) and raise `LspError` - Added the correct `pid` variable capture before setting `_process = None` - Passed `cmd` (the list command) to error details instead of accessing `_process.command` - Added new Behave test scenario + step definition All 24 scenarios in the LSP transport coverage feature pass: - lint: ✓ - typecheck: ✓ - unit_tests (features/lsp_transport_coverage.feature): 24/24 passed, 98 steps passed New PR: https://git.cleverthis.com/cleveragents/cleveragents-core/pulls/11203 --- Automated by CleverAgents Bot Supervisor: Implementation | Agent: task-implementor
HAL9001 left a comment

Code Review — PR #11185: fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start()

Summary

This PR correctly addresses the resource leak in StdioTransport.start() — the production code change in transport.py is logically sound, well-commented, and properly integrates with the existing stop() lifecycle. However, I am requesting changes due to four blocking issues found during review:

  1. Duplicate Behave step definition (BLOCKING — root cause of unit_tests CI failure)
  2. Inline imports of LspError violate project import rules (BLOCKING)
  3. PR missing required Type/ label and milestone (BLOCKING per merge requirements)
  4. CONTRIBUTORS.md references wrong PR number (BLOCKING correctness issue)

In addition, there is one typo in the feature file and the feature scenario count is inconsistently described in the PR body.


CI Status

  • lint: passing
  • typecheck: passing
  • quality: passing
  • security: passing
  • unit_tests: FAILING — see blocking issue #1 below
  • coverage: skipped (blocked by unit_tests failure)
  • integration_tests: passing
  • build: passing

All required CI gates must be green before merge. The unit_tests failure is caused by a duplicate Behave step definition introduced by this PR.


Blocking Issues

1. Duplicate Behave Step Definition (root cause of CI failure)

@when("ltcov I try to start the transport") is defined at both line 361 (pre-existing) and line 563 (added by this PR) in features/steps/lsp_transport_coverage_steps.py. Behave raises AmbiguousStep when it encounters duplicate step matchers, which is why unit_tests is failing in CI.

The fix is to remove the newly added duplicate definition at line 563. The existing definition at line 361 already captures exceptions and stores them in context.ltcov_error. The only functional difference between the two definitions is that the new one also sets context.ltcov_error = None on the success path — if needed, simply add that line to the existing definition at line 361 instead.

2. Inline Imports of LspError Violate Project Import Rules

The project mandates all imports must be at the top of the file (only exception: if TYPE_CHECKING: guards). The PR adds a third inline import of LspError inside the start() method body at line 95, in addition to two pre-existing inline imports at lines 117 and 124.

The correct fix is to move from cleveragents.lsp.errors import LspError to the top-level import section of transport.py, and remove all three inline occurrences. This PR is the ideal opportunity to clean them up together.

3. PR Missing Required Type/ Label and Milestone

Per CONTRIBUTING.md merge requirements, every PR must have exactly one Type/ label and a milestone matching the linked issue(s). The linked issue #7044 is Type/Bug on milestone v3.6.0. This PR has no labels and no milestone assigned. Please set Type/Bug and milestone v3.6.0 before re-requesting review.

4. CONTRIBUTORS.md References Wrong PR Number

The newly added line reads ...fix (PR #11160 / issue #11160)... but the PR number is #11185, not #11160. Issue #11160 is the implementation issue. Please correct the attribution to PR #11185 / issue #11160.


Non-Blocking Observations

Typo in feature file: Scenario name at line 30 reads returnscode — should be returncode (missing the letter placement is wrong). Minor but misleading as living documentation.

PR description says 4 scenarios: The PR body states the feature file has 4 scenarios but it actually contains 5. Please update the description.

Branch naming convention: The branch is named fix/stdlib-transport-cleanup. Per project convention, bug fix branches should use bugfix/mN-<name> format (e.g., bugfix/m6-lsp-transport-cleanup). Cannot be changed after submission — noted for future reference only.

TDD regression tag: The feature file does not include @tdd_issue @tdd_issue_7047 tags on the regression scenarios. The companion TDD issue #7047 exists and is State/Verified. Per project convention, regression tests for bugs should carry the TDD issue tag.

stop() return type: self.stop() returns int | None. In the new code path the process has already exited so stop() returns an integer in practice, but Pyright sees int | None. Consider code = self.stop() or 0 or a type narrowing assertion to keep strict-mode clean.


What is Correct

  • The poll()-based liveness check logic in transport.py is correct and solves the stated resource leak.
  • stop() is correctly called to release the subprocess handle before raising.
  • LspError includes command and exit code in details — appropriate for debugging.
  • The logger.warning call before raising is good practice.
  • CHANGELOG.md entry is present under [Unreleased]/Fixed and references issue #11160.
  • Commit message matches Conventional Changelog format with ISSUES CLOSED: #11160 footer.
  • Behave feature file structure and scenario organisation are clear and readable.
  • Type annotations are complete on all new functions.
  • No hardcoded secrets or security issues introduced.

Please address the 4 blocking issues above, then re-request review.


Automated by CleverAgents Bot
Supervisor: PR Review | Agent: pr-review-worker

## Code Review — PR #11185: fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start() ### Summary This PR correctly addresses the resource leak in `StdioTransport.start()` — the production code change in `transport.py` is logically sound, well-commented, and properly integrates with the existing `stop()` lifecycle. However, I am requesting changes due to **four blocking issues** found during review: 1. **Duplicate Behave step definition** (BLOCKING — root cause of `unit_tests` CI failure) 2. **Inline imports of `LspError` violate project import rules** (BLOCKING) 3. **PR missing required `Type/` label and milestone** (BLOCKING per merge requirements) 4. **`CONTRIBUTORS.md` references wrong PR number** (BLOCKING correctness issue) In addition, there is one typo in the feature file and the feature scenario count is inconsistently described in the PR body. --- ### CI Status - **lint**: passing - **typecheck**: passing - **quality**: passing - **security**: passing - **unit_tests**: FAILING — see blocking issue #1 below - **coverage**: skipped (blocked by unit_tests failure) - **integration_tests**: passing - **build**: passing All required CI gates must be green before merge. The `unit_tests` failure is caused by a duplicate Behave step definition introduced by this PR. --- ### Blocking Issues #### 1. Duplicate Behave Step Definition (root cause of CI failure) `@when("ltcov I try to start the transport")` is defined at both line 361 (pre-existing) and line 563 (added by this PR) in `features/steps/lsp_transport_coverage_steps.py`. Behave raises `AmbiguousStep` when it encounters duplicate step matchers, which is why `unit_tests` is failing in CI. The fix is to remove the newly added duplicate definition at line 563. The existing definition at line 361 already captures exceptions and stores them in `context.ltcov_error`. The only functional difference between the two definitions is that the new one also sets `context.ltcov_error = None` on the success path — if needed, simply add that line to the existing definition at line 361 instead. #### 2. Inline Imports of `LspError` Violate Project Import Rules The project mandates all imports must be at the top of the file (only exception: `if TYPE_CHECKING:` guards). The PR adds a third inline import of `LspError` inside the `start()` method body at line 95, in addition to two pre-existing inline imports at lines 117 and 124. The correct fix is to move `from cleveragents.lsp.errors import LspError` to the top-level import section of `transport.py`, and remove all three inline occurrences. This PR is the ideal opportunity to clean them up together. #### 3. PR Missing Required `Type/` Label and Milestone Per CONTRIBUTING.md merge requirements, every PR must have exactly one `Type/` label and a milestone matching the linked issue(s). The linked issue #7044 is `Type/Bug` on milestone `v3.6.0`. This PR has no labels and no milestone assigned. Please set `Type/Bug` and milestone `v3.6.0` before re-requesting review. #### 4. `CONTRIBUTORS.md` References Wrong PR Number The newly added line reads `...fix (PR #11160 / issue #11160)...` but the PR number is #11185, not #11160. Issue #11160 is the implementation issue. Please correct the attribution to `PR #11185 / issue #11160`. --- ### Non-Blocking Observations **Typo in feature file:** Scenario name at line 30 reads `returnscode` — should be `returncode` (missing the letter placement is wrong). Minor but misleading as living documentation. **PR description says 4 scenarios:** The PR body states the feature file has 4 scenarios but it actually contains 5. Please update the description. **Branch naming convention:** The branch is named `fix/stdlib-transport-cleanup`. Per project convention, bug fix branches should use `bugfix/mN-<name>` format (e.g., `bugfix/m6-lsp-transport-cleanup`). Cannot be changed after submission — noted for future reference only. **TDD regression tag:** The feature file does not include `@tdd_issue @tdd_issue_7047` tags on the regression scenarios. The companion TDD issue #7047 exists and is `State/Verified`. Per project convention, regression tests for bugs should carry the TDD issue tag. **`stop()` return type:** `self.stop()` returns `int | None`. In the new code path the process has already exited so `stop()` returns an integer in practice, but Pyright sees `int | None`. Consider `code = self.stop() or 0` or a type narrowing assertion to keep strict-mode clean. --- ### What is Correct - The `poll()`-based liveness check logic in `transport.py` is correct and solves the stated resource leak. - `stop()` is correctly called to release the subprocess handle before raising. - `LspError` includes command and exit code in `details` — appropriate for debugging. - The `logger.warning` call before raising is good practice. - `CHANGELOG.md` entry is present under `[Unreleased]/Fixed` and references issue #11160. - Commit message matches Conventional Changelog format with `ISSUES CLOSED: #11160` footer. - Behave feature file structure and scenario organisation are clear and readable. - Type annotations are complete on all new functions. - No hardcoded secrets or security issues introduced. Please address the 4 blocking issues above, then re-request review. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Wrong PR number in attribution line

This line reads PR #11160 / issue #11160 but the correct PR number is #11185 (this PR). Issue #11160 is the implementation issue — the correct attribution should read PR #11185 / issue #11160.

How to fix: Change PR #11160 to PR #11185 on this line.


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**BLOCKING — Wrong PR number in attribution line** This line reads `PR #11160 / issue #11160` but the correct PR number is **#11185** (this PR). Issue #11160 is the implementation issue — the correct attribution should read `PR #11185 / issue #11160`. **How to fix:** Change `PR #11160` to `PR #11185` on this line. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
@ -0,0 +27,4 @@
When ltcov I try to start the transport
Then ltcov the error should be an LspError with message "died on spawn"
Scenario: start raises LspError when process returnscode is zero (clean exit)
Owner

Minor (non-blocking) — Typo in scenario name

returnscode should be returncode — the word returns was accidentally merged with code, creating a nonexistent attribute name. Scenario names serve as living documentation, so accuracy matters.

Suggestion: Change returnscode to returncode.


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**Minor (non-blocking) — Typo in scenario name** `returnscode` should be `returncode` — the word `returns` was accidentally merged with `code`, creating a nonexistent attribute name. Scenario names serve as living documentation, so accuracy matters. **Suggestion:** Change `returnscode` to `returncode`. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Duplicate step definition (root cause of unit_tests CI failure)

This @when("ltcov I try to start the transport") decorator is a duplicate of the step already defined at line 361 of this same file. Behave treats duplicate step matchers as AmbiguousStep errors, which causes every scenario using this step to fail.

Why this is a problem: Behave cannot determine which of the two matching step definitions to use when it encounters When ltcov I try to start the transport in a feature file. It raises AmbiguousStep, failing the entire test suite — this is the direct cause of the unit_tests CI failure.

How to fix: Remove this new duplicate definition (lines 563-570). The existing definition at line 361 already handles exception capture. If you need context.ltcov_error = None set on the success path, add that one line to the existing definition at line 361 instead of adding a second decorator.


Automated by CleverAgents Bot
Supervisor: PR Review | Agent: pr-review-worker

**BLOCKING — Duplicate step definition (root cause of unit_tests CI failure)** This `@when("ltcov I try to start the transport")` decorator is a duplicate of the step already defined at line 361 of this same file. Behave treats duplicate step matchers as `AmbiguousStep` errors, which causes every scenario using this step to fail. **Why this is a problem:** Behave cannot determine which of the two matching step definitions to use when it encounters `When ltcov I try to start the transport` in a feature file. It raises `AmbiguousStep`, failing the entire test suite — this is the direct cause of the `unit_tests` CI failure. **How to fix:** Remove this new duplicate definition (lines 563-570). The existing definition at line 361 already handles exception capture. If you need `context.ltcov_error = None` set on the success path, add that one line to the existing definition at line 361 instead of adding a second decorator. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Inline import violates project import rules

This from cleveragents.lsp.errors import LspError import is inside the start() method body. CONTRIBUTING.md mandates all imports must be at the top of the file; the only permitted exception is if TYPE_CHECKING: guards.

Why this is a problem: Inline function-scoped imports are not discovered by static analysis at module load time, are inconsistent with project conventions, and introduce three separate import statements for the same symbol in this file.

How to fix:

  1. Add from cleveragents.lsp.errors import LspError to the top-level import section of transport.py (after stdlib imports, before structlog).
  2. Remove this inline import at the start of start().
  3. Also remove the two existing inline imports in the except FileNotFoundError and except OSError blocks (pre-existing violations this PR should clean up).

Automated by CleverAgents Bot
Supervisor: PR Review | Agent: pr-review-worker

**BLOCKING — Inline import violates project import rules** This `from cleveragents.lsp.errors import LspError` import is inside the `start()` method body. CONTRIBUTING.md mandates all imports must be at the top of the file; the only permitted exception is `if TYPE_CHECKING:` guards. **Why this is a problem:** Inline function-scoped imports are not discovered by static analysis at module load time, are inconsistent with project conventions, and introduce three separate import statements for the same symbol in this file. **How to fix:** 1. Add `from cleveragents.lsp.errors import LspError` to the top-level import section of `transport.py` (after stdlib imports, before `structlog`). 2. Remove this inline import at the start of `start()`. 3. Also remove the two existing inline imports in the `except FileNotFoundError` and `except OSError` blocks (pre-existing violations this PR should clean up). --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

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--- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
HAL9001 left a comment

First Review — REQUEST_CHANGES

Thank you for the contribution. The core fix logic — polling the process after Popen() to detect immediate death and calling stop() before raising LspError — is correct and addresses the resource leak. However, there are several blocking issues that must be resolved before this PR can be approved and merged.


BLOCKING Issues

1. CI unit_tests FAILING (hard merge gate)

The CI / unit_tests (pull_request) job is failing. Per CONTRIBUTING.md, all required CI checks — including unit_tests and coverage — must pass before a PR can be merged. The coverage check was skipped as a downstream consequence of the unit test failure. This PR cannot be approved until CI is fully green.

Please investigate the test failure, fix the failing scenarios, and push a new commit.

2. PR description missing Closes #N closing keyword

The PR body does not contain a Closes #11160 or Fixes #11160 keyword. CONTRIBUTING.md requires a closing keyword for every linked issue. The CHANGELOG entry references #11160 and the commit footer has ISSUES CLOSED: #11160, but the PR description body itself has no closing keyword. Please add Closes #11160 to the PR description body.

3. PR has no labels and no milestone

The PR currently has no Type/ label (required: exactly one, e.g. Type/Bug), no Priority/ label, and no milestone. The linked issue #11160 is on milestone v3.6.0; the PR must match. Per CONTRIBUTING.md, all three are mandatory merge pre-conditions.

4. Branch naming convention violated

The branch name is fix/stdlib-transport-cleanup. Per CONTRIBUTING.md, bug fix branches MUST follow the format bugfix/mN-<descriptive-name> where N is the milestone number. For milestone v3.6.0, the correct prefix is bugfix/m6-. The prefix fix/ is not a valid branch prefix in this project.

5. Python import rule violated — inline imports inside function body

This project requires ALL imports at the top of the file. The PR adds a new inline from cleveragents.lsp.errors import LspError at the top of start(), and the existing except blocks already have two more inline imports of the same symbol. All three violate the import rules. Please remove all inline occurrences and add a single module-level import at the top of transport.py. The only permitted exception is if TYPE_CHECKING: guards; circular imports must be resolved architecturally.

6. Bug fix missing @tdd_issue_N regression test tag

Per the TDD bug fix workflow in CONTRIBUTING.md, regression tests for bugs must carry a @tdd_issue_<issue_number> Behave tag. There is no @tdd_issue_11160 tag on any scenario in the new .feature file. Please tag the relevant regression scenario(s) accordingly.

7. Issue #11160 describes a different fix scope than what is implemented

Issue #11160 body describes: wrapping the post-Popen logger.info call in a try/except that calls stop() to handle exceptions thrown by the logging call. The PR instead implements a poll() liveness check for a process that died immediately after spawn — a different failure mode. While the poll() check is a valid and valuable fix, it does not match the issue description. Please either update issue #11160 to reflect this actual fix scope, or reference a new/different issue that correctly describes the implemented change.


Suggestions (non-blocking)

  • Typo in .feature file: "dye_on_start" on line 43 appears to be a typo for "die_on_start".
  • Unused step definition: step_ltcov_error_has_exit_code_detail is defined but no scenario uses the "ltcov the error should have exit_code in details" step. Remove or exercise it.
  • code could be None: stop() returns int | None, so code in the error message could display None. Consider capturing self._process.returncode before calling stop() to make the intent explicit, even though in practice code will never be None here.

Overall Assessment

The fix direction is correct and the implementation logic is sound. The blocking issues are primarily process and policy compliance: CI must be green, PR metadata must be corrected (labels, milestone, closing keyword, branch name), import style must be fixed, and the TDD regression tag must be present. Please address all blocking items and push a new commit.


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## First Review — REQUEST_CHANGES Thank you for the contribution. The core fix logic — polling the process after `Popen()` to detect immediate death and calling `stop()` before raising `LspError` — is correct and addresses the resource leak. However, there are several blocking issues that must be resolved before this PR can be approved and merged. --- ### BLOCKING Issues #### 1. CI unit_tests FAILING (hard merge gate) The `CI / unit_tests (pull_request)` job is failing. Per CONTRIBUTING.md, all required CI checks — including `unit_tests` and `coverage` — must pass before a PR can be merged. The `coverage` check was skipped as a downstream consequence of the unit test failure. This PR cannot be approved until CI is fully green. Please investigate the test failure, fix the failing scenarios, and push a new commit. #### 2. PR description missing `Closes #N` closing keyword The PR body does not contain a `Closes #11160` or `Fixes #11160` keyword. CONTRIBUTING.md requires a closing keyword for every linked issue. The CHANGELOG entry references `#11160` and the commit footer has `ISSUES CLOSED: #11160`, but the PR description body itself has no closing keyword. Please add `Closes #11160` to the PR description body. #### 3. PR has no labels and no milestone The PR currently has no `Type/` label (required: exactly one, e.g. `Type/Bug`), no `Priority/` label, and no milestone. The linked issue #11160 is on milestone `v3.6.0`; the PR must match. Per CONTRIBUTING.md, all three are mandatory merge pre-conditions. #### 4. Branch naming convention violated The branch name is `fix/stdlib-transport-cleanup`. Per CONTRIBUTING.md, bug fix branches MUST follow the format `bugfix/mN-<descriptive-name>` where N is the milestone number. For milestone `v3.6.0`, the correct prefix is `bugfix/m6-`. The prefix `fix/` is not a valid branch prefix in this project. #### 5. Python import rule violated — inline imports inside function body This project requires ALL imports at the top of the file. The PR adds a new inline `from cleveragents.lsp.errors import LspError` at the top of `start()`, and the existing `except` blocks already have two more inline imports of the same symbol. All three violate the import rules. Please remove all inline occurrences and add a single module-level import at the top of `transport.py`. The only permitted exception is `if TYPE_CHECKING:` guards; circular imports must be resolved architecturally. #### 6. Bug fix missing `@tdd_issue_N` regression test tag Per the TDD bug fix workflow in CONTRIBUTING.md, regression tests for bugs must carry a `@tdd_issue_<issue_number>` Behave tag. There is no `@tdd_issue_11160` tag on any scenario in the new `.feature` file. Please tag the relevant regression scenario(s) accordingly. #### 7. Issue #11160 describes a different fix scope than what is implemented Issue #11160 body describes: wrapping the post-Popen `logger.info` call in a `try/except` that calls `stop()` to handle exceptions thrown by the logging call. The PR instead implements a `poll()` liveness check for a process that died immediately after spawn — a different failure mode. While the `poll()` check is a valid and valuable fix, it does not match the issue description. Please either update issue #11160 to reflect this actual fix scope, or reference a new/different issue that correctly describes the implemented change. --- ### Suggestions (non-blocking) - **Typo in `.feature` file**: `"dye_on_start"` on line 43 appears to be a typo for `"die_on_start"`. - **Unused step definition**: `step_ltcov_error_has_exit_code_detail` is defined but no scenario uses the `"ltcov the error should have exit_code in details"` step. Remove or exercise it. - **`code` could be `None`**: `stop()` returns `int | None`, so `code` in the error message could display `None`. Consider capturing `self._process.returncode` before calling `stop()` to make the intent explicit, even though in practice `code` will never be `None` here. --- ### Overall Assessment The fix direction is correct and the implementation logic is sound. The blocking issues are primarily process and policy compliance: CI must be green, PR metadata must be corrected (labels, milestone, closing keyword, branch name), import style must be fixed, and the TDD regression tag must be present. Please address all blocking items and push a new commit. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
@ -0,0 +20,4 @@
When ltcov I try to start the transport
Then ltcov the error should be an LspError with message "died on spawn"
And ltcov the internal process should be None
Owner

BLOCKING — Missing @tdd_issue_11160 regression tag

Per the TDD bug fix workflow, regression test scenarios for bugs must carry a @tdd_issue_<N> Behave tag (e.g. @tdd_issue_11160). This scenario directly tests the regression case (process dying on spawn) and should be tagged accordingly.


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**BLOCKING — Missing `@tdd_issue_11160` regression tag** Per the TDD bug fix workflow, regression test scenarios for bugs must carry a `@tdd_issue_<N>` Behave tag (e.g. `@tdd_issue_11160`). This scenario directly tests the regression case (process dying on spawn) and should be tagged accordingly. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

Suggestion — Typo in command name

"dye_on_start" appears to be a typo for "die_on_start". While the string is just a mock argument and does not affect test correctness, it would be confusing to future readers.


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**Suggestion — Typo in command name** `"dye_on_start"` appears to be a typo for `"die_on_start"`. While the string is just a mock argument and does not affect test correctness, it would be confusing to future readers. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

Suggestion — Unused step definition

step_ltcov_error_has_exit_code_detail (step: "ltcov the error should have exit_code in details") is defined here but no scenario in any .feature file uses it. Dead step definitions add noise. Please either add a scenario that exercises this assertion, or remove the dead definition.


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**Suggestion — Unused step definition** `step_ltcov_error_has_exit_code_detail` (step: `"ltcov the error should have exit_code in details"`) is defined here but no scenario in any `.feature` file uses it. Dead step definitions add noise. Please either add a scenario that exercises this assertion, or remove the dead definition. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Python import rule violation

This inline import violates the project rule that all imports must be at the top of the file. There are also two duplicate inline imports of the same symbol in the existing except blocks below.

Fix: Remove all three inline from cleveragents.lsp.errors import LspError occurrences and add a single module-level import at the top of transport.py alongside the other imports. If a circular import prevents this, break the cycle architecturally — deferred imports are not acceptable in this project.


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**BLOCKING — Python import rule violation** This inline import violates the project rule that all imports must be at the top of the file. There are also two duplicate inline imports of the same symbol in the existing `except` blocks below. **Fix:** Remove all three inline `from cleveragents.lsp.errors import LspError` occurrences and add a single module-level import at the top of `transport.py` alongside the other imports. If a circular import prevents this, break the cycle architecturally — deferred imports are not acceptable in this project. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

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HAL9001 left a comment

Re-Review — PR #11185: fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start()

This re-review was triggered because PR #11185 has an open REQUEST_CHANGES review (review #8751, submitted 2026-05-14T00:26:38Z). However, no new commits have been pushed to this branch since that review was submitted. The only commit on this branch is c97e53a from 2026-05-13T01:19:58Z — predating the review.

All four blocking issues from the previous review remain unaddressed. The CI failure (unit_tests) persists for the same root cause.


Verification: Prior Feedback Status

Blocking Issue #1 — Duplicate Behave Step Definition (STILL UNRESOLVED)

The duplicate @when("ltcov I try to start the transport") decorator appears at both line 361 (pre-existing) and line 563 (added by this PR) in features/steps/lsp_transport_coverage_steps.py. Behave raises AmbiguousStep on this — confirmed cause of unit_tests CI failure.

Required fix: Remove the newly added duplicate definition at line 563. The pre-existing definition at line 361 already captures exceptions in context.ltcov_error. If the success-path context.ltcov_error = None assignment is needed, add it to the existing definition at line 361 only.

Blocking Issue #2 — Inline Import of LspError Violates Import Rules (STILL UNRESOLVED)

from cleveragents.lsp.errors import LspError is still placed inline inside the start() method body at line 95 of transport.py. The project mandates all imports be at the top of the file (only exception: if TYPE_CHECKING: guards). Additionally, the pre-existing inline imports at lines 117 and 124 remain — this PR is the ideal opportunity to clean them all up together.

Required fix: Move from cleveragents.lsp.errors import LspError to the top-level import section of transport.py and remove all three inline occurrences (lines 95, 117, and 124).

Blocking Issue #3 — Missing Type/ Label and Milestone (STILL UNRESOLVED)

The PR still has no labels and no milestone assigned. Per CONTRIBUTING.md merge requirements, every PR must have exactly one Type/ label and a milestone matching the linked issue(s). Based on the linked issue #11160 (a bug fix), the correct label is Type/Bug and the milestone should match whatever milestone is assigned to issue #11160.

Required fix: Assign Type/Bug label and the correct milestone to this PR.

Blocking Issue #4CONTRIBUTORS.md References Wrong PR Number (STILL UNRESOLVED)

Line 46 of CONTRIBUTORS.md still reads: ...fix (PR #11160 / issue #11160)... — the PR number is incorrect. This PR is #11185. Issue #11160 is the linked implementation issue.

Required fix: Change PR #11160 to PR #11185 on line 46 of CONTRIBUTORS.md.


CI Status

  • lint: passing
  • typecheck: passing
  • quality: passing
  • security: passing
  • unit_tests: FAILING — duplicate step definition (Blocking Issue #1)
  • coverage: skipped (blocked by unit_tests failure)
  • integration_tests: passing
  • build: passing

All required CI gates must be green before merge. The unit_tests failure is blocking.


What Remains Correct

The production code change in transport.py (the poll()-based liveness check and stop() call on early process death) is still logically correct and well-implemented. The CHANGELOG entry is present and appropriately formatted. The overall approach continues to be the right fix for the stated resource leak.


Action Required

Please address all 4 blocking issues listed above, then re-request review. The fixes are straightforward:

  1. Remove the duplicate step definition at line 563 of lsp_transport_coverage_steps.py
  2. Move the LspError import to the top of transport.py, removing all 3 inline occurrences
  3. Add Type/Bug label and correct milestone to the PR
  4. Fix PR #11160PR #11185 in CONTRIBUTORS.md line 46

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## Re-Review — PR #11185: fix(lsp): cleanup subprocess on failed initialization in StdioTransport.start() This re-review was triggered because PR #11185 has an open REQUEST_CHANGES review (review #8751, submitted 2026-05-14T00:26:38Z). However, **no new commits have been pushed to this branch since that review was submitted.** The only commit on this branch is `c97e53a` from 2026-05-13T01:19:58Z — predating the review. **All four blocking issues from the previous review remain unaddressed.** The CI failure (`unit_tests`) persists for the same root cause. --- ### Verification: Prior Feedback Status #### ❌ Blocking Issue #1 — Duplicate Behave Step Definition (STILL UNRESOLVED) The duplicate `@when("ltcov I try to start the transport")` decorator appears at **both** line 361 (pre-existing) **and** line 563 (added by this PR) in `features/steps/lsp_transport_coverage_steps.py`. Behave raises `AmbiguousStep` on this — confirmed cause of `unit_tests` CI failure. **Required fix:** Remove the newly added duplicate definition at line 563. The pre-existing definition at line 361 already captures exceptions in `context.ltcov_error`. If the success-path `context.ltcov_error = None` assignment is needed, add it to the existing definition at line 361 only. #### ❌ Blocking Issue #2 — Inline Import of `LspError` Violates Import Rules (STILL UNRESOLVED) `from cleveragents.lsp.errors import LspError` is still placed inline inside the `start()` method body at line 95 of `transport.py`. The project mandates all imports be at the top of the file (only exception: `if TYPE_CHECKING:` guards). Additionally, the pre-existing inline imports at lines 117 and 124 remain — this PR is the ideal opportunity to clean them all up together. **Required fix:** Move `from cleveragents.lsp.errors import LspError` to the top-level import section of `transport.py` and remove all three inline occurrences (lines 95, 117, and 124). #### ❌ Blocking Issue #3 — Missing `Type/` Label and Milestone (STILL UNRESOLVED) The PR still has no labels and no milestone assigned. Per CONTRIBUTING.md merge requirements, every PR must have exactly one `Type/` label and a milestone matching the linked issue(s). Based on the linked issue #11160 (a bug fix), the correct label is `Type/Bug` and the milestone should match whatever milestone is assigned to issue #11160. **Required fix:** Assign `Type/Bug` label and the correct milestone to this PR. #### ❌ Blocking Issue #4 — `CONTRIBUTORS.md` References Wrong PR Number (STILL UNRESOLVED) Line 46 of `CONTRIBUTORS.md` still reads: `...fix (PR #11160 / issue #11160)...` — the PR number is incorrect. This PR is **#11185**. Issue #11160 is the linked implementation issue. **Required fix:** Change `PR #11160` to `PR #11185` on line 46 of `CONTRIBUTORS.md`. --- ### CI Status - **lint**: passing ✅ - **typecheck**: passing ✅ - **quality**: passing ✅ - **security**: passing ✅ - **unit_tests**: **FAILING** ❌ — duplicate step definition (Blocking Issue #1) - **coverage**: skipped (blocked by unit_tests failure) - **integration_tests**: passing ✅ - **build**: passing ✅ All required CI gates must be green before merge. The `unit_tests` failure is blocking. --- ### What Remains Correct The production code change in `transport.py` (the `poll()`-based liveness check and `stop()` call on early process death) is still logically correct and well-implemented. The CHANGELOG entry is present and appropriately formatted. The overall approach continues to be the right fix for the stated resource leak. --- ### Action Required Please address all 4 blocking issues listed above, then re-request review. The fixes are straightforward: 1. Remove the duplicate step definition at line 563 of `lsp_transport_coverage_steps.py` 2. Move the `LspError` import to the top of `transport.py`, removing all 3 inline occurrences 3. Add `Type/Bug` label and correct milestone to the PR 4. Fix `PR #11160` → `PR #11185` in `CONTRIBUTORS.md` line 46 --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Wrong PR number in attribution line (still unresolved)

This line reads PR #11160 / issue #11160 but the correct PR number is #11185 (this PR). Issue #11160 is the linked implementation issue.

This was flagged in the previous review (review #8751, inline comment #261439) and has not been addressed.

Fix: Change PR #11160 to PR #11185 on this line.


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**BLOCKING — Wrong PR number in attribution line (still unresolved)** This line reads `PR #11160 / issue #11160` but the correct PR number is **#11185** (this PR). Issue #11160 is the linked implementation issue. This was flagged in the previous review (review #8751, inline comment #261439) and has not been addressed. **Fix:** Change `PR #11160` to `PR #11185` on this line. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Duplicate step definition (still unresolved; root cause of CI failure)

The @when("ltcov I try to start the transport") decorator at this location (line 563) duplicates the pre-existing definition at line 361. Behave raises AmbiguousStep when it encounters two matching step definitions — this is why unit_tests continues to fail in CI.

This was flagged in the previous review (review #8751, inline comment #261437) and has not been addressed.

Fix: Remove this duplicate definition (lines 563–568). The existing definition at line 361 already captures exceptions into context.ltcov_error. If you need the success-path context.ltcov_error = None assignment, add that single line to the existing definition at line 361 instead.


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**BLOCKING — Duplicate step definition (still unresolved; root cause of CI failure)** The `@when("ltcov I try to start the transport")` decorator at this location (line 563) duplicates the pre-existing definition at line 361. Behave raises `AmbiguousStep` when it encounters two matching step definitions — this is why `unit_tests` continues to fail in CI. This was flagged in the previous review (review #8751, inline comment #261437) and has not been addressed. **Fix:** Remove this duplicate definition (lines 563–568). The existing definition at line 361 already captures exceptions into `context.ltcov_error`. If you need the success-path `context.ltcov_error = None` assignment, add that single line to the existing definition at line 361 instead. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

BLOCKING — Inline import violates project import rules (still unresolved)

This from cleveragents.lsp.errors import LspError import is placed inside the start() method body. CONTRIBUTING.md mandates all imports must be at the top of the file (the only exception is if TYPE_CHECKING: guards). Pre-existing inline imports also remain at lines 117 and 124.

This was flagged in the previous review (review #8751, inline comment #261438) and has not been addressed.

Fix: Move from cleveragents.lsp.errors import LspError to the top-level import section of transport.py and remove all three inline occurrences (current lines 95, 117, and 124). This PR is the ideal opportunity to clean all three up together.


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**BLOCKING — Inline import violates project import rules (still unresolved)** This `from cleveragents.lsp.errors import LspError` import is placed inside the `start()` method body. CONTRIBUTING.md mandates all imports must be at the top of the file (the only exception is `if TYPE_CHECKING:` guards). Pre-existing inline imports also remain at lines 117 and 124. This was flagged in the previous review (review #8751, inline comment #261438) and has not been addressed. **Fix:** Move `from cleveragents.lsp.errors import LspError` to the top-level import section of `transport.py` and remove all three inline occurrences (current lines 95, 117, and 124). This PR is the ideal opportunity to clean all three up together. --- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Owner

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--- Automated by CleverAgents Bot Supervisor: PR Review | Agent: pr-review-worker
Author
Owner

[GROOMED] Quality analysis complete.

  • Duplicate of PRs #11203, #11160: all titled "fix(lsp): cleanup subprocess on failed initialization". Same fix attempted twice.
  • Labels: Added State/In Progress + Type/Bug. Both need priority assignment and milestone alignment.
  • Linked issue #11185 not found via API (may be closed or renamed).

Groomed by: grooming-worker

[GROOMED] Quality analysis complete. - Duplicate of PRs #11203, #11160: all titled "fix(lsp): cleanup subprocess on failed initialization". Same fix attempted twice. - Labels: Added State/In Progress + Type/Bug. Both need priority assignment and milestone alignment. - Linked issue #11185 not found via API (may be closed or renamed). --- Groomed by: grooming-worker
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