GNU bug report logs - #58291
29.0.50; MacOS compilation warning for possibly unitialized use in emacs.c

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Package: emacs;

Reported by: Gerd Möllmann <gerd.moellmann <at> gmail.com>

Date: Tue, 4 Oct 2022 15:27:01 UTC

Severity: normal

Found in version 29.0.50

Done: Stefan Kangas <stefankangas <at> gmail.com>

Bug is archived. No further changes may be made.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Subject: bug#58291: closed (Re: bug#58291: 29.0.50; MacOS compilation
 warning for possibly unitialized use in emacs.c)
Date: Tue, 04 Oct 2022 18:59:02 +0000
[Message part 1 (text/plain, inline)]
Your bug report

#58291: 29.0.50; MacOS compilation warning for possibly unitialized use in emacs.c

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 58291 <at> debbugs.gnu.org.

-- 
58291: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=58291
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
[Message part 2 (message/rfc822, inline)]
From: Stefan Kangas <stefankangas <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>,
 Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: 58291-done <at> debbugs.gnu.org, Andreas Schwab <schwab <at> linux-m68k.org>
Subject: Re: bug#58291: 29.0.50; MacOS compilation warning for possibly
 unitialized use in emacs.c
Date: Tue, 4 Oct 2022 20:57:57 +0200
Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Gerd Möllmann <gerd.moellmann <at> gmail.com> writes:
>
>> This is latest master as of writing this.  When compiling emacs, I see
>>
>> emacs.c:899:7: warning: variable 'bufsize' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
>>   if (!(emacs_executable && *emacs_executable))
>>       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> emacs.c:964:7: note: uninitialized use occurs here
>>   if (bufsize < needed)
>>       ^~~~~~~
>
> I guess this might be related to Andreas' recent fix?  Added to the CCs.

This is fixed on emacs-28 and merged to master.  Closing.

[Message part 3 (message/rfc822, inline)]
From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.0.50; MacOS compilation warning for possibly unitialized use in
 emacs.c
Date: Tue, 04 Oct 2022 17:26:32 +0200
In GNU Emacs 29.0.50 (build 5, aarch64-apple-darwin21.6.0, NS
 appkit-2113.60 Version 12.6 (Build 21G115)) of 2022-10-04 built on
 Mini.fritz.box
Repository revision: 849b7756fd31a69791e67dfe010b1e10f0168c83
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2113
System Description:  macOS 12.6

This is latest master as of writing this.  When compiling emacs, I see

emacs.c:899:7: warning: variable 'bufsize' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
  if (!(emacs_executable && *emacs_executable))
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
emacs.c:964:7: note: uninitialized use occurs here
  if (bufsize < needed)
      ^~~~~~~
emacs.c:899:3: note: remove the 'if' if its condition is always false
  if (!(emacs_executable && *emacs_executable))
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
emacs.c:928:3: note: variable 'bufsize' is declared here
  ptrdiff_t bufsize = exenamelen + strlen (suffix) + 1;
  ^
emacs.c:1755:17: warning: 'fork' is deprecated: Use posix_spawn or fork [-Wdeprecated-declarations]
            f = fork ();  /* in orig */



This bug report was last modified 2 years and 281 days ago.

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