[Bug 805752] Re: fontforge crashed with SIGSEGV in GImageRead_Png(): no change rebuild required

[Fumihito YOSHIDA]

Okay, I tested with clean installed oneiric Beta2, problem still exists.
The suspect is pkgbinarymangler::pkgstripfiles(::optipng).
pkgbinarymangler kicked at build-process in only archive-build[1].  We
built at PPA/private pbuilder,  pkgstripfiles does not kicked[2] and
that works fine.

Collateral evidence:
When you install good fontforge packegs from my PPA[3], exec below command...problem reproduced!  Breaker is optipng (of cource, fontforges PNG reader is still suspicous, and we need workaround). 
  <<<WARNING: Before exec, please backup *png files>>>
 $ cd /usr/share/fontforge/pixmaps/
 $ sudo optipng -o4 -preserve *png

So, we have to one-more-rebuild with NO_PNG_PKG_MANGLE for good
fontforge packages.

# But, we are in FinalFreeze :(

[1] https://launchpadlibrarian.net/81558874/buildlog_ubuntu-oneiric-i386.fontforge_0.0.20110222-1build1_BUILDING.txt.gz
[2] https://launchpadlibrarian.net/81653514/buildlog_ubuntu-oneiric-i386.fontforge_0.0.20110222-1build2%7Eppa1_BUILDING.txt.gz
[3] https://launchpad.net/~hito/+archive/ppa/+packages

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https://bugs.launchpad.net/bugs/805752

Title:
  fontforge crashed with SIGSEGV in GImageRead_Png(): no change rebuild
  required

Status in “fontforge” package in Ubuntu:
  Fix Released

Bug description:
  I simply clicked on one of the free fonts downloaded from Google
  (Cabin).  Fontforge consistently crashes with any TTF font.

  TEST CASE:
  1. Launch fontforge
  2. Open a TTF file

  Result:
  fontforge segfaults

  ProblemType: Crash
  DistroRelease: Ubuntu 11.10
  Package: fontforge 0.0.20110222-1
  ProcVersionSignature: Ubuntu 3.0-3.4-generic 3.0.0-rc5
  Uname: Linux 3.0-3-generic x86_64
  NonfreeKernelModules: wl
  Architecture: amd64
  CrashCounter: 1
  Date: Mon Jul  4 22:13:11 2011
  ExecutablePath: /usr/bin/fontforge
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcCmdline: fontforge /home/username/Download/tempo/Cabin/Cabin-Bold.ttf
  ProcEnviron:
   LANGUAGE=pt_BR:en
   PATH=(custom, user)
   LANG=pt_BR.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7f9fc30d0d0f <GImageRead_Png+1407>:	movzbl (%rax),%eax
   PC (0x7f9fc30d0d0f) ok
   source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: fontforge
  StacktraceTop:
   GImageRead_Png () from /usr/lib/libgutils.so.1
   GImageReadPng () from /usr/lib/libgutils.so.1
   ?? () from /usr/lib/libgdraw.so.4
   ?? () from /usr/lib/libgdraw.so.4
   GMenuItem2ArrayCopy () from /usr/lib/libgdraw.so.4
  Title: fontforge crashed with SIGSEGV in GImageRead_Png()
  UpgradeStatus: Upgraded to oneiric on 2011-07-02 (2 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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