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bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since
From: |
Eli Zaretskii |
Subject: |
bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece |
Date: |
Mon, 25 Sep 2023 07:52:22 +0300 |
> Date: Sun, 24 Sep 2023 16:02:03 -0700
> From: Jim Porter <jporterbugs@gmail.com>
>
> > Thread 1 "emacs" received signal SIGPIPE, Broken pipe.
> > 0x00007ffff57bffef in write () from /lib/x86_64-linux-gnu/libpthread.so.0
> > #0 0x00007ffff57bffef in write () at /lib/x86_64-linux-gnu/libpthread.so.0
> > #1 0x00005555556f2f08 in emacs_full_write (fd=19, buf=0x5555565918b8 "hi",
> > nbyte=2, interruptible=-1) at sysdep.c:2812
> [snip]
>
> Thanks. This looks like it's caused when Eshell runs a command something
> like this:
>
> echo hi | sh -c 'if [ -t 0 ]; then echo stdin; fi; ...'
>
> (Note that the pipe above is handled entirely by Eshell, using
> 'process-send-string' in this case.) I'm guessing that sometimes, the
> 'sh' process has exited by the time Eshell calls '(process-send-string
> PROC "hi")'. Presumably, the commit you identified (which just changed
> some debug logging) altered the timings by just enough to trigger this
> race condition for you.
>
> However, I don't understand why this would cause an abort though;
> normally, 'process-send-string' should just signal an Elisp error (which
> Eshell then catches and does the right thing with it). Maybe there's a
> bug somewhere in process.c where it's not correctly handling the (real)
> SIGPIPE signal and converting it to an Elisp signal?
In batch mode, SIGPIPE is not ignored by Emacs, see init_signals.
This was changed 11 years ago, see commit 4d7e6e51dd.
Perhaps Eshell should check that the process is still alive before
calling process-send-string?
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jens Schmidt, 2023/09/24
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jim Porter, 2023/09/24
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece,
Eli Zaretskii <=
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jim Porter, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jim Porter, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Eli Zaretskii, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Paul Eggert, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Eli Zaretskii, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jim Porter, 2023/09/25
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jens Schmidt, 2023/09/28
- bug#66186: "make lisp/eshell/esh-proc-tests" fails intermittently since 7e50861ca7ed3f620fe62ac6572f6e88b3600ece, Jens Schmidt, 2023/09/25