GNU bug report logs - #47596
File descriptor error when exiting emacs on android 11

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Package: emacs;

Reported by: Henrik Grimler <henrik <at> grimler.se>

Date: Sun, 4 Apr 2021 19:21:02 UTC

Severity: normal

Tags: moreinfo

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Henrik Grimler <henrik <at> grimler.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 47596 <at> debbugs.gnu.org
Subject: bug#47596: File descriptor error when exiting emacs on android 11
Date: Mon, 05 Apr 2021 10:59:55 +0200

Hi again,


> Compiling this, on any optimisation level, is enough to trigger the
> error:
> 
> ```
> #include <stdio.h>
> int main()
> {
>   fdopen (2, "w");
>   fclose (stderr);
> }
> ```

Changing to this:

```

#include <stdio.h>
int main()
{
  FILE *err = fdopen (2, "w");
  fclose (err);
}
```

makes it work. So I suppose the sanitizer does not like that stderr is
closed with `fclose (stderr)` instead of by using the fd obtained from
fdopen (which was thrown away in my minimal example). 

Still not sure if this is actually problematic, but at least now I
understand how the sanitizer "thinks".

Best regards,
Henrik Grimler
This bug report was last modified 2 years and 323 days ago.

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