GNU bug report logs - #44724
Uninitialised variables in syntax.c cause trouble.

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From: martin rudalics <rudalics <at> gmx.at>
To: Alan Mackenzie <acm <at> muc.de>, 44724 <at> debbugs.gnu.org
Subject: bug#44724: Uninitialised variables in syntax.c cause trouble.
Date: Wed, 18 Nov 2020 18:57:37 +0100

> In src/syntax.c, there are several uninitialised static variables, one of
> which is find_start_value.
>
> It is used in function find_defun_start before being initialised.  The
> first use is at L.14 of the function, this:
>
>        && pos >= find_start_value
>
> .  This has the effect of causing a certain (forward-comment -1) (which
> calls back_comment, which calls find_defun_start) to fail.
>
> In my test setup (I am writing tests for syntax.c), find_start_value's
> value at loading time was randomly 1270, which was spuriously inside the
> comment I was trying to scan backwards over.  back_comment thus failed to
> recognise the comment, and returned failed.

Just curious: Did current_buffer == find_start_buffer really succeed
in your scenario?

martin

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