Hello,
Eelco Dolstra <[EMAIL PROTECTED]>
writes:
> Note the "Broken pipe" message from M4. So it's that bug again :-)
>
> I experimented with SIGPIPE a bit more and it turns out that this Nix
> expression
> randomly fails (i.e. sometimes it says "Broken pipe" and sometimes it
> doesn't):
>
> dummy = runCommand "foo" {} ''
> seq 10000 | tee foo | head > /dev/null
> '';
>
> The root cause is that Nix sets the SIGPIPE handler to SIG_IGN, which is
> inherited by all the children. I don't remember *why* we're ignoring SIGPIPE,
> but there was probably a good reason ;-) So I've committed a fix that sets
> SIGPIPE to SIG_DFL when running the builder.
Good to see that you found out! Let's cross fingers and hope it will
remove a class of mysterious bugs.
BTW, was it on x86-64? Bison's test suite appears to run flawlessly
here on i686.
Thanks!
Ludo'.
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