BUG-HUNT: [error-handling] Broad exception handling in auto_debug.py #3084

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opened 2026-04-05 05:26:54 +00:00 by freemo · 1 comment

freemo commented

2026-04-05 05:26:54 +00:00

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Branch: fix/error-handling/auto-debug-broad-exception
Commit Message: fix(agents): replace broad exception handling in AutoDebugAgent with specific exception types
Milestone: Backlog (no milestone assigned)
Parent Epic: #362

Bug Report: [error-handling] — Broad exception handling in auto_debug.py

Severity Assessment

Impact: May hide bugs in the agent itself by swallowing unexpected errors.
Likelihood: High, as any unexpected error will be caught.
Priority: Medium

Location

File: src/cleveragents/agents/graphs/auto_debug.py
Function/Class: _analyze_error, _generate_fix, _validate_fix
Lines: 120, 195, 261

Description

The _analyze_error, _generate_fix, and _validate_fix methods in the AutoDebugAgent use broad except Exception clauses. While this makes the agent resilient, it can also swallow unexpected errors that should be investigated. A more specific exception handling strategy would be better. For example, catching specific exceptions from the llm.invoke call.

Per the project's error handling standards in CONTRIBUTING.md: "Exceptions should only be caught if they can be meaningfully handled (e.g., for retries or resource cleanup). Errors must not be suppressed."

Evidence

        except Exception as exc:  # pragma: no cover - defensive
            logger.warning("LLM analysis failed, using fallback: %s", exc)
            analysis = "Error analysis completed"

Expected Behavior

The code should catch more specific exceptions where possible, and let unexpected exceptions propagate to the top-level execution context for proper logging and handling.

Actual Behavior

All exceptions are caught and logged as a warning, which might hide underlying issues and violates the project's exception propagation standards.

Suggested Fix

Refactor the exception handling to catch more specific exceptions, such as those related to the LLM provider or network issues. Unexpected exceptions should be allowed to propagate.

Subtasks

Identify the specific exception types raised by llm.invoke and related LLM provider calls
Refactor _analyze_error (line 120) to catch only specific, meaningful exceptions
Refactor _generate_fix (line 195) to catch only specific, meaningful exceptions
Refactor _validate_fix (line 261) to catch only specific, meaningful exceptions
Update or add Behave unit tests in features/ to cover the new exception handling paths
Ensure all nox stages pass with the refactored code

Definition of Done

All three methods use specific exception types instead of broad except Exception
Unexpected exceptions propagate correctly and are not swallowed
All existing Behave unit tests continue to pass
New Behave unit tests cover the specific exception handling paths
All nox stages pass
Coverage >= 97%

Backlog note: This issue was discovered during autonomous operation
on milestone . It does not block milestone completion and has been
placed in the backlog for human review and future milestone assignment.

Automated by CleverAgents Bot
Supervisor: Unknown | Agent: ca-new-issue-creator

## Metadata - **Branch**: `fix/error-handling/auto-debug-broad-exception` - **Commit Message**: `fix(agents): replace broad exception handling in AutoDebugAgent with specific exception types` - **Milestone**: Backlog (no milestone assigned) - **Parent Epic**: #362 ## Bug Report: [error-handling] — Broad exception handling in auto_debug.py ### Severity Assessment - **Impact**: May hide bugs in the agent itself by swallowing unexpected errors. - **Likelihood**: High, as any unexpected error will be caught. - **Priority**: Medium ### Location - **File**: `src/cleveragents/agents/graphs/auto_debug.py` - **Function/Class**: `_analyze_error`, `_generate_fix`, `_validate_fix` - **Lines**: 120, 195, 261 ### Description The `_analyze_error`, `_generate_fix`, and `_validate_fix` methods in the `AutoDebugAgent` use broad `except Exception` clauses. While this makes the agent resilient, it can also swallow unexpected errors that should be investigated. A more specific exception handling strategy would be better. For example, catching specific exceptions from the `llm.invoke` call. Per the project's error handling standards in CONTRIBUTING.md: *"Exceptions should only be caught if they can be meaningfully handled (e.g., for retries or resource cleanup). Errors must not be suppressed."* ### Evidence ```python except Exception as exc: # pragma: no cover - defensive logger.warning("LLM analysis failed, using fallback: %s", exc) analysis = "Error analysis completed" ``` ### Expected Behavior The code should catch more specific exceptions where possible, and let unexpected exceptions propagate to the top-level execution context for proper logging and handling. ### Actual Behavior All exceptions are caught and logged as a warning, which might hide underlying issues and violates the project's exception propagation standards. ### Suggested Fix Refactor the exception handling to catch more specific exceptions, such as those related to the LLM provider or network issues. Unexpected exceptions should be allowed to propagate. ### Category error-handling ## Subtasks - [ ] Identify the specific exception types raised by `llm.invoke` and related LLM provider calls - [ ] Refactor `_analyze_error` (line 120) to catch only specific, meaningful exceptions - [ ] Refactor `_generate_fix` (line 195) to catch only specific, meaningful exceptions - [ ] Refactor `_validate_fix` (line 261) to catch only specific, meaningful exceptions - [ ] Update or add Behave unit tests in `features/` to cover the new exception handling paths - [ ] Ensure all nox stages pass with the refactored code ## Definition of Done - [ ] All three methods use specific exception types instead of broad `except Exception` - [ ] Unexpected exceptions propagate correctly and are not swallowed - [ ] All existing Behave unit tests continue to pass - [ ] New Behave unit tests cover the specific exception handling paths - [ ] All nox stages pass - [ ] Coverage >= 97% > **Backlog note:** This issue was discovered during autonomous operation > on milestone <M>. It does not block milestone completion and has been > placed in the backlog for human review and future milestone assignment. --- **Automated by CleverAgents Bot** Supervisor: Unknown | Agent: ca-new-issue-creator

freemo added a new dependency

2026-04-05 05:29:30 +00:00

#362 Epic: Security & Safety Hardening

freemo added the

MoSCoW

Could have

label

2026-04-05 05:58:11 +00:00

freemo added this to the v3.6.0 milestone

2026-04-05 05:58:28 +00:00

freemo commented

2026-04-05 05:59:04 +00:00

Author

Owner

Issue triaged by project owner:

State: Verified ✅
Priority: Backlog (kept as-is — code quality improvement, not blocking)
Milestone: v3.6.0 (assigned — error handling improvements fit the "Advanced Concepts" scope)
MoSCoW: Could Have — valid error-handling improvement per CONTRIBUTING.md standards, but the AutoDebugAgent functions correctly in practice. This is a defensive improvement for better debuggability.
Parent Epic: #362 (Security & Safety Hardening) — dependency link created

Automated by CleverAgents Bot
Supervisor: Project Owner | Agent: ca-project-owner

Issue triaged by project owner: - **State**: Verified ✅ - **Priority**: Backlog (kept as-is — code quality improvement, not blocking) - **Milestone**: v3.6.0 (assigned — error handling improvements fit the "Advanced Concepts" scope) - **MoSCoW**: Could Have — valid error-handling improvement per CONTRIBUTING.md standards, but the AutoDebugAgent functions correctly in practice. This is a defensive improvement for better debuggability. - **Parent Epic**: #362 (Security & Safety Hardening) — dependency link created --- **Automated by CleverAgents Bot** Supervisor: Project Owner | Agent: ca-project-owner

freemo referenced this issue

2026-04-05 06:15:23 +00:00

[CA-AUTO] UAT Pool Supervisor — v3.2.0–v3.7.0 — Session Tracker #3094

freemo removed this from the v3.6.0 milestone

2026-04-07 00:20:11 +00:00