compiz crashed with SIGSEGV in pango_coverage_ref()

[EliCoten]

No idea what happened - was just trying to search in the dash and all of a sudden it crashed.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: unity 7.1.2+13.10.20131014.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-14.21-generic 3.11.7
Uname: Linux 3.11.0-14-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Wed Dec 4 16:23:23 2013
ExecutablePath: /usr/bin/compiz
MarkForUpload: True
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f36c348c6f5 <pango_coverage_ref+5>: lock addl $0x1,(%rdi)
 PC (0x7f36c348c6f5) ok
 source "$0x1" ok
 destination "(%rdi)" (0x1360000000000) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 pango_coverage_ref () from /usr/lib/x86_64-linux-gnu/libpango-1.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libpangoft2-1.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libpango-1.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libpango-1.0.so.0
Title: compiz crashed with SIGSEGV in pango_coverage_ref()
UpgradeStatus: Upgraded to saucy on 2013-11-15 (19 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo wireshark www-data

[Apport retracing service (apport)]

StacktraceTop:
 pango_coverage_ref (coverage=0x1360000000000) at /build/buildd/pango1.0-1.32.5/./pango/pango-coverage.c:124
 _pango_fc_font_map_get_coverage (fcfontmap=fcfontmap@entry=0x7f36d000af60, fcfont=fcfont@entry=0x7f369c095a90) at /build/buildd/pango1.0-1.32.5/./pango/pangofc-fontmap.c:1880
 pango_fc_font_get_coverage (font=0x7f369c095a90, language=<optimized out>) at /build/buildd/pango1.0-1.32.5/./pango/pangofc-font.c:339
 pango_engine_shape_real_covers (engine=<optimized out>, font=<optimized out>, language=<optimized out>, wc=84) at /build/buildd/pango1.0-1.32.5/./pango/pango-engine.c:62
 get_shaper_and_font_foreach (fontset=<optimized out>, font=0x7f369c095a90, data=0x7f36a8bc9fe0) at /build/buildd/pango1.0-1.32.5/./pango/pango-context.c:1173

[Stephen M. Webb (bregma)]

Another mysterious Pango font rendering crash.

Marking as triaged because of the quality backtrace, but without reliable steps to reproduce, this bug may languish.

[Will Cooke (willcooke)]

As part of the big bug clear up for 16.04 LTS I am marking this bug as Wont Fix. These types of crasher are better handled by errors.ubutnu.com which can collate similar crash reports to help us identify persitent bugs rather than one-off crashes. Sorry we are not able to help with this specific issue. If you are still experiencing this crash, please re-open the bug and add the tag “desktop-bugscrub-reopen”. See https://wiki.ubuntu.com/BigDesktopBugScrub for more information.