[Bug 918655] Re: fontforge crashed with SIGSEGV in SFIsSomethingBuildable()

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: fontforge (Ubuntu)
       Status: New => Confirmed

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Title:
  fontforge crashed with SIGSEGV in SFIsSomethingBuildable()

Status in “fontforge” package in Ubuntu:
  Confirmed

Bug description:
  
  Crash happened after selecting new font option changing encoding to full unicode going to code point uf8000 in plane 16 and clicking element.  

  Also tries building from source for fontforge 20110222 , when built
  from source fontforge does not crash in this way.

  A similar crash occurs if highlight a character in plane 16 and try to
  move it using arrows.

  Other combinations of movements can cause crashes - none of which I
  have been able to reproduce in the same version fontforge   built from
  source.

  This bug was not present in the unbuntu fontforge package from Lucid
  but first noticed when updated to Maverick.

  The number of combinations causing crashes sufficient great to make
  the current ubuntu package unusable to those wishing to work on full
  unicode fonts.

  ProblemType: Crash
  DistroRelease: Ubuntu 10.10
  Package: fontforge 0.0.20090923-2ubuntu1
  ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
  Uname: Linux 2.6.35-22-generic i686
  Architecture: i386
  Date: Thu Jan 19 12:06:46 2012
  ExecutablePath: /usr/bin/fontforge
  LiveMediaBuild: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  ProcCmdline: fontforge
  ProcEnviron:
   SHELL=/bin/bash
   LANG=en_US.UTF-8
  SegvAnalysis:
   Segfault happened at: 0xc6d826 <SFIsSomethingBuildable+86>:	cmpb   $0x0,0x4(%ecx,%eax,4)
   PC (0x00c6d826) ok
   source "$0x0" ok
   destination "0x4(%ecx,%eax,4)" (0x08685324) not located in a known VMA region (needed writable region)!
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: fontforge
  StacktraceTop:
   SFIsSomethingBuildable () from /usr/lib/libfontforge.so.1
   ?? ()
   ?? () from /usr/lib/libgdraw.so.4
   ?? () from /usr/lib/libgdraw.so.4
   ?? () from /usr/lib/libgdraw.so.4
  Title: fontforge crashed with SIGSEGV in SFIsSomethingBuildable()
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  XsessionErrors:
   (polkit-gnome-authentication-agent-1:4363): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
   (nautilus:4371): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed

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