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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/27681] FAIL: gdb.base/help.exp: apropos \(print[^[
 bsiedf\".-]\) (timeout)
Date: Thu, 08 Apr 2021 08:57:20 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27681

--- Comment #20 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Michael Matz from comment #15)
> (Sidenote: I think there's no conforming possiblity to use the GNU extens=
ion
> correctly without leaks, because there's no GNU extension equivalent of
> regfree,
> ala re_free or somesuch).

I did some further investigation, and have started to suspect that the reas=
on
why the regex GNU extensions in glibc are so poorly documented, is because
they're documented at gnulib.

And at gnulib docs (
https://www.gnu.org/software/gnulib/manual/html_node/Freeing-GNU-Pattern-Bu=
ffers.html#Freeing-GNU-Pattern-Buffers
) I read:
...
To free any allocated fields of a pattern buffer, use the POSIX function
regfree:

void
regfree (regex_t *preg)

preg is the pattern buffer whose allocated fields you want freed; this works
because since the type regex_t=E2=80=94the type for POSIX pattern buffers=
=E2=80=94is equivalent
to the type re_pattern_buffer.=20
...

--=20
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