bug#21402: race condition with compile mode line number parser

[Lars Ingebrigtsen]

積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

> There is a race condition, whereas for me of
> (compile "seq 99|perl -nwle 'print \"XX:$.:$_\"'" nil)
> (compile "seq 999|perl -nwle 'print \"XX:$.:$_\"'" nil)
> (compile "seq 9999|perl -nwle 'print \"XX:$.:$_\"'" nil)
> the first and third ones complete with no problems,
> whereas the middle one always stops at
>
> XX:392:392
> XX:393
> Compilation finished at Wed Sep  2 08:46:23

I'm unable to reproduce this bug in Emacs 27.  Are you still seeing this?

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