flake: TestRetryWithInterval

[flake-investigator]

CI Run Link: https://github.com/coder/coder/actions/runs/26586696037
Failing Job: https://github.com/coder/coder/actions/runs/26586696037/job/78334548165 (test-go-pg-17, run_attempt 1)
Failure time: 2026-05-28T16:15:42Z

Commit Info:

• SHA: 094fe971ad9226582efbef39fdd4ea5636af3ceb
• Author: DevCats
• Commit title: "chore(aibridge): add AWS PRM user-agent attribution for Bedrock calls (#25221)"
• Commit: coder/coder@094fe97

Failure evidence:

=== FAIL: cli TestRetryWithInterval/Stops_NonRetryableError (unknown)
=== FAIL: cli TestRetryWithInterval/Stops_ContextCanceled (unknown)
=== FAIL: cli TestRetryWithInterval/Succeeds_FirstTry (unknown)
=== FAIL: cli TestRetryWithInterval/Succeeds_AfterTransientFailures (unknown)
=== FAIL: cli TestRetryWithInterval/Stops_MaxAttemptsExhausted (unknown)
=== FAIL: cli TestRetryWithInterval (unknown)

2026-05-28 16:12:26.227 [warn] transient error, retrying  error="lookup example.com: no such host"  attempt=1
sloghuman: failed to write entry: io: read/write on closed pipe

Error analysis:

• gotestsum reported all TestRetryWithInterval subtests as "unknown" while the test logs show retryWithInterval emitting transient DNS errors and slogtest reporting write failures to a closed pipe.
• This suggests a flaky interaction with the slogtest logger or stdio capture during these retry tests (no panic or crash observed).

Root cause classification:

• A. Flaky Test (logging/stdio capture during retryWithInterval subtests)

Data race / panic / OOM checks:

• No WARNING: DATA RACE, panic:, or OOM indicators found in the retrieved logs.

Precise assignment analysis:

• Intended blame command: git blame -L 520,595 cli/ssh_internal_test.go (TestRetryWithInterval).
• Recent file history: git log --oneline -10 --follow cli/ssh_internal_test.go -> 1d0653cd (Ehab Younes) "fix(cli): retry dial timeouts in SSH connection setup".
• Assigning to the most recent substantive modifier of the retryWithInterval test area.

Related issues search (coder/internal):

• "TestRetryWithInterval"
• "RetryWithInterval"
• "lookup example.com"
• "transient error, retrying"
  No matches found.

Reproduction (best effort):

go test ./cli -run TestRetryWithInterval -count=50