bugThe FreeType Project - Bugs: bug #23337, NULL pointer referencing

 
 

bug #23337: NULL pointer referencing

Submitted by:  None
Submitted on:  Fri 23 May 2008 09:12:41 PM UTC  
 
Severity: 3 - NormalItem Group: Crash
Status: Works For MePrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: None

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Fri 09 Jul 2010 02:29:34 PM UTC, comment #4:

Meanwhile, a whole bunch of crashes has been fixed. Since you've never provided more details, I'm closing this report.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Mon 10 Nov 2008 08:49:34 AM UTC, comment #3:

Hi Werner,

I finally got it to crash a little more reliable again. I will check at home and report you back on where it's coming from.

Thanks for your patience.

Steven Van Ingelgem <g00fy>
Wed 28 May 2008 09:34:41 PM UTC, comment #2:

Hi Werner,

It happened on Linux with the nv driver. It never happened on Windows yet.
I'll be trying in the weekend if I can make it crash.

I have my program crashing all the time on that line, so I guess it's repeatable, I just don't know where it comes from as you can see fromo the backtrace...

I'll keep you posted.

Steven Van Ingelgem <g00fy>
Wed 28 May 2008 08:43:33 AM UTC, comment #1:

Looking into the code I can't see a way how to get the crash you've observed. In case it is repeatable please provide a recipe or more debug information, otherwise I have to close this report as invalid.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Fri 23 May 2008 09:12:41 PM UTC, original submission:

Somehow with the latest CVS version as of the time of writing of this bug, I got a NULL pointer usage in:

src/base/ftobjs.c:647

  • 1 Thread 0xb6805a60 (LWP 32193) 0x085fb4ac in FT_Load_Glyph (face=0x8b8b438, glyph_index=81, load_flags=512)

at /src/screensaver/externals/freetype2/src/base/ftobjs.c:647
(gdb) bt
#0 0x085fb4ac in FT_Load_Glyph (face=0x8b8b438, glyph_index=81, load_flags=512) at /src/screensaver/externals/freetype2/src/base/ftobjs.c:647
#1 0xb765baa2 in ?? () from /usr/lib/libcairo.so.2
#2 0x08b8b438 in ?? ()
#3 0x00000051 in ?? ()
#4 0xb762436c in ?? () from /usr/lib/libcairo.so.2
#5 0x08ceef80 in ?? ()
#6 0x08d4fb90 in ?? ()
#7 0x00000001 in ?? ()
#8 0x00000051 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb) display
2: hinter->clazz = (FT_Module_Class *) 0x0
1: hinter = (FT_Module) 0x8b6f190

I don't have any clue in fact from where it is, but I think it's when I load up a font with FTGL.

gcc (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu7)
Linux steven-desktop 2.6.24-17-generic #1 SMP Thu May 1 14:31:33 UTC 2008 i686 GNU/Linux

(Ubuntu 8.04)

If you need any more tests done, please advise so I can help you help me ;)

Anonymous

 

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  • -unavailable- added by g00fy (Posted a comment)
  • -unavailable- added by wl (Posted a comment)
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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri 09 Jul 2010 02:29:34 PM UTCwlStatusNeed Info=>Works For Me
      Open/ClosedOpen=>Closed
    Wed 28 May 2008 08:43:33 AM UTCwlStatusNone=>Need Info
      Assigned toNone=>wl

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