hq job info crashes when piped to head

[lahwaacz]

I just did:

$ hq job info 3 | head
+----------------------+--------------------------------------------+
| ID                   | 3                                          |
| Name                 |                                            |
| State                | [###############.........................] |
|                      | RUNNING (148)                              |
|                      | FAILED (1)                                 |
|                      | FINISHED (511)                             |
|                      | CANCELED (1)                               |
|                      | WAITING (1495)                             |
| Session              | closed                                     |
2025-03-14T20:29:39Z ERROR Cannot print table to stdout: Os { code: 32, kind: BrokenPipe, message: "Broken pipe" }

thread 'main' panicked at library/std/src/io/stdio.rs:1123:9:
failed printing to stdout: Broken pipe (os error 32)
stack backtrace:
   0:     0x563037152e6a - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::he089f96442833f67
   1:     0x563037181823 - core::fmt::write::h2f210ed4c94745cb
   2:     0x56303714e503 - std::io::Write::write_fmt::h7de08171ab770fb2
   3:     0x563037152cb2 - std::sys::backtrace::BacktraceLock::print::h810fbd31421329e6
   4:     0x5630371540d0 - std::panicking::default_hook::{{closure}}::hbaad47ed9dc6356d
   5:     0x563037153eb0 - std::panicking::default_hook::h24e207139139d40a
   6:     0x563036bc89d1 - hq::main::{{closure}}::{{closure}}::hccf81f73b4a8672a
Oops, HyperQueue has crashed. This is a bug, sorry for that.
If you would be so kind, please report this issue at the HQ issue tracker: https://github.com/It4innovations/hyperqueue/issues/new?title=HQ%20crashes
Please include the above error (starting from "thread ... panicked ...") and the stack backtrace in the issue contents, along with the following information:

HyperQueue version: 0.21.0-dev

You can also re-run HyperQueue server (and its workers) with the `RUST_LOG=hq=debug,tako=debug`
environment variable, and attach the logs to the issue, to provide us more information.

The full output is quite long (so I tried to use head 😄) and I need to redact some paths, but let me know if something important is missing.

hq.log

[lahwaacz]

HQ is built from source at ddfee03.

[spirali]

As I understand the problem: Rust catches SIGPIPE and propagates it as an io error. So to be a compatible with standard UNIX cli apps, we should just silently quit on BrokenPipe error.

[Kobzol]

Yeah this is a known Rust thing (rust-lang/rust#62569). We should deal with SIGPIPE properly to make this work, it makes sense to pipe certain hq commands.