If generateContent() throws (network error, rate-limit, malformed response), the catch block runs but the 15-second timer is never cleared. The timer fires later, calling controller.abort() on a stale AbortController. The generateContent call here is used for progressive enhancement (distilling large tool outputs). Failures are expected and handled gracefully, which means the error path is a realistic code path not just a theoretical edge case.

TL;DR

The clearTimeout call should be moved to a finally block to ensure it runs on every exit path, preventing stale AbortController aborts.

Guidance

• Move the clearTimeout(timeoutId) call to a finally block to guarantee its execution regardless of the method's outcome.
• Review similar timeout implementations in the codebase to ensure consistency with the established pattern in fetchWithTimeout.
• Verify that the finally block is correctly handling the clearTimeout call by testing both success and failure paths.
• Consider adding a comment or documentation to highlight the importance of clearing timeouts in all exit paths.

Example

try {
  const controller = new AbortController();
  const timeoutId = setTimeout(() => controller.abort(), 15000);

  const summaryResponse = await this.geminiClient.generateContent(...);

  return summaryResponse.candidates?.[0]?.content?.parts?.[0]?.text;
} catch (e) {
  return undefined;
} finally {
  clearTimeout(timeoutId);
}

Notes

This fix assumes that the finally block will correctly handle the clearTimeout call. If the codebase has specific requirements or constraints that might affect this, additional review may be necessary.

Recommendation

Apply workaround: Move the clearTimeout call to a finally block to ensure it runs on every exit path, as this directly addresses the identified issue and aligns with the established pattern in fetchWithTimeout.