Broken pipe when trimming lines (head)
Metadata
Current evaluation
BrokenPipeError when piping craft-cli output into `head` was fixed by merged PR canonical/craft-cli#443 (commit 15f312f), which makes the printer ignore broken pipes on write and stream cleanup; issue #378 closed as resolved.
Resolution: closed resolved
Reason: PR craft-cli#443 ("fix(printer): ignore broken pipe on output streams") was merged as commit 15f312f, adding a broken-pipe-swallowing write helper in craft_cli/printer.py plus unit/integration tests asserting no BrokenPipeError reaches stderr; maintainer sergiusens referenced the CPython discussion and closed #378.
Evaluated by: mr-cal-bot
No scores available.
Issue body
```
❯ snapcraft revisions snapcraft | head -n1
stead. The old name will be removed in a future release. Rev. Uploaded Arches Version Channels
Exception ignored in: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'>
BrokenPipeError: [Errno 32] Broken pipe
```
Evaluation history
| Date | Model | Scores | Action | Summary |
|---|---|---|---|---|
| stealth/space-bunny-alpha | — | closed resolved | BrokenPipeError when piping craft-cli output into `head` was fixed by merged PR canonical/craft-cli#443 (commit 15f312f), which makes the printer ignore broken pipes on write and stream cleanup; issue #378 closed as resolved. | |
| stealth/space-bunny-alpha | — | closed resolved | Fixed by merged craft-cli PR #443, commit 15f312f: printer writes and cleanup suppress BrokenPipeError, so piping output to early-closing commands such as head no longer errors. | |
| qwen/qwen3.6-35b-a3b |
Impact:
30
Quick Win:
22
Complexity:
10
Confidence:
85
Actionability:
80
|
close resolved | BrokenPipeError when piping output to head -n1. Fix already implemented in craft_cli/printer.py via _safe_print with suppress(BrokenPipeError). | |
| qwen/qwen3.8-27b |
Impact:
25
Quick Win:
20
Staleness:
45
Complexity:
20
Confidence:
85
Support Request:
5
|
keep open | BrokenPipeError traceback when piping snapcraft output to an early-closing consumer like `head -n1`. Fix is scoped to ignoring BrokenPipeError in the printer's stream handling; draft PR #443 is open and awaiting review. | |
| qwen/qwen3.6-35b-a3b |
Staleness:
65
Complexity:
15
Confidence:
85
Support Request:
0
|
needs triage | Reports a BrokenPipeError when piping snapcraft output to head. A contributor analyzed the stream handling and submitted a draft PR to gracefully ignore the error during output cleanup. | |
| qwen3.6-35b-a3b-mtp-q6 |
Staleness:
65
Complexity:
15
Confidence:
85
Support Request:
0
|
keep open | Reports a BrokenPipeError when piping snapcraft output to head. A contributor analyzed the stream handling and submitted draft PR #443 to catch the exception during printer cleanup. Awaiting maintainer review. |
Update history
| Date | Change |
|---|---|
| closed |
Related work
-
Likely Fixed By:
canonical/craft-cli#443
(confidence 97%)
Merged PR cited in the issue comments as the narrow fix, merged in commit 15f312f; code and tests confirmed present in craft_cli/printer.py and tests.
Related issues
| Issue | Project | State | Summary | Similarity |
|---|---|---|---|---|
| #721 charmcraft revisions Broken pipe on head / tail commands | charmcraft | closed | Resolved in Charmcraft 2.0.0 through enhanced Craft CLI output handling in merged PR #635 (commit d36b21d8); piping revisions output to head no longer raises BrokenPipeError. | |
| #443 fix(printer): ignore broken pipe on output streams | craft-cli | merged | Merged in canonical/craft-cli#443 via commit 15f312f, making printer output ignore BrokenPipeError and avoid crashes when downstream consumers close early. | |
| #1779154 BrokenPipeError when `| head`ing output | snapcraft (launchpad) | open | Piping any snapcraft command's output to `head` (e.g. `snapcraft revisions multipass | head`) emits a spurious BrokenPipeError at exit; no SIGPIPE/BrokenPipe handling exists in the codebase or its history. |