GNU bug report logs - #18501
24.3.93; OS X; crash in free() when calling macfont_close()

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Package: emacs;

Reported by: Jim Radford <radford <at> blackbean.org>

Date: Thu, 18 Sep 2014 21:52:01 UTC

Severity: normal

Found in version 24.3.93

Done: Alan Third <alan <at> idiocy.org>

Bug is archived. No further changes may be made.

Full log

Message #14 received at 18501 <at> debbugs.gnu.org (full text, mbox):

From: Jim Radford <radford <at> blackbean.org>
To: 18501 <at> debbugs.gnu.org
Subject: Re: bug#18501: Acknowledgement (24.3.93; OS X; crash in free() when
 calling macfont_close())
Date: Fri, 19 Sep 2014 11:05:28 -0700

Here are the two calls that free the font:

    frame #1: 0x00000001001c5ffd Emacs`macfont_close(font=0x0000000105c2a8c0) + 13 at macfont.m:2621
    frame #2: 0x000000010014de80 Emacs`font_clear_cache(f=<unavailable>, cache=<unavailable>, driver=<unavailable>) + 304 at font.c:2620

    frame #1: 0x00000001001c5ffd Emacs`macfont_close(font=0x0000000105c2a8c0) + 13 at macfont.m:2621
    frame #2: 0x000000010011be9d Emacs`Fgarbage_collect [inlined] cleanup_vector + 38 at alloc.c:2935

Notice that the pointer is the same in both cases.  Both cleanup_vector() and font_clear_cache() call

    drv->close(font)

It seems that font_clear_cache is leaving the font around for the GC to clean up (a second time) later.
This bug report was last modified 9 years ago.

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