dev_agentandClaude Opus 5.5
1ea2b6de82
The burst of canceled waits went through Fetch, where net/http races the failed first write against its read loop on the torn-down connection, so the error returned was sometimes EOF or "use of closed network connection" instead of context.DeadlineExceeded (release/2026-10-06c pull_request CI, run 468 / job 6104). Drive the burst through waitTurn, the wait turnConn's first Write makes, which returns the wait's error directly. Advance the fake clock during the burst and check the host's slot is still the first send, so a slot leaked by a canceled wait now fails the test; the request after the burst still goes out exactly HostInterval after the first send with no wait. Production code is unchanged. Maestro: 73e54394-0c57-444d-bd5a-a14ca76dd9e8 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>