I frequently get this crash when closing Chromium.  Xubuntu 12.04 on
x86_64.

The apport crash file has


SegvAnalysis:
 Segfault happened at: 0x7f0e0ea0e2e0:  add    %al,(%rax)
 PC (0x7f0e0ea0e2e0) in non-executable VMA region: 
0x7f0e0e91a000-0x7f0e0ebe5000 rw-p None
 source "%al" ok
 destination "(%rax)" (0x00000000) not located in a known VMA region (needed 
writable region)!
SegvReason:
 executing writable VMA None
 writing NULL VMA
SourcePackage: chromium-browser
Stacktrace:
 #0  0x00007f0e0ea0e2e0 in ?? () from 
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
 No symbol table info available.
 #1  <signal handler called>
 No symbol table info available.
 #2  0x00007f0e16b63d84 in pthread_cond_wait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
 No symbol table info available.
 #3  0x00007f0e1b42be00 in ?? ()
 No symbol table info available.
 #4  0x00007f0e1b42be24 in ?? ()
 No symbol table info available.
 #5  0x00007f0e1b416f0b in ?? ()
 No symbol table info available.
 #6  0x00007f0e1b411f60 in ?? ()
 No symbol table info available.
 #7  0x00007f0e1b3a85ac in ?? ()
 No symbol table info available.
 #8  0x00007f0e1b3a7cc1 in ?? ()
 No symbol table info available.
 #9  0x00007f0e1b3a7181 in ?? ()
 No symbol table info available.
 #10 0x00007f0e1ac9ef08 in ?? ()
 No symbol table info available.
 #11 0x00007f0e1ac9dd36 in ?? ()
 No symbol table info available.
 #12 0x00007f0e1471476d in __libc_start_main () from 
/lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
 #13 0x00007f0e1ac9ee11 in ?? ()
 No symbol table info available.
 #14 0x00007fff81ab6fc8 in ?? ()
 No symbol table info available.
 #15 0x000000000000001c in ?? ()
 No symbol table info available.
 #16 0x0000000000000003 in ?? ()
 No symbol table info available.
 #17 0x00007fff81ab793c in ?? ()
 No symbol table info available.
 #18 0x0000000000000000 in ?? ()
 No symbol table info available.
StacktraceTop:
 pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Tags:  precise
ThreadStacktrace:
 .
 Thread 3 (Thread 0x7f0e0b6f4700 (LWP 2647)):
 #0  0x00007f0e147e16d9 in syscall () from /lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
 #1  0x00007f0e1b452f3a in ?? ()
 No symbol table info available.
 #2  0x00007f0e1b4529d1 in ?? ()
 No symbol table info available.
 #3  0x00007f0e1b450a75 in ?? ()
 No symbol table info available.
 #4  0x00007f0e1b3f0b6d in ?? ()
 No symbol table info available.
 #5  0x00007f0e1b411f60 in ?? ()
 No symbol table info available.
 #6  0x00007f0e1b432f9c in ?? ()
 No symbol table info available.
 #7  0x00007f0e1b430803 in ?? ()
 No symbol table info available.
 #8  0x00007f0e16b5fe9a in start_thread () from 
/lib/x86_64-linux-gnu/libpthread.so.0
 No symbol table info available.
 #9  0x00007f0e147e54bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
 #10 0x0000000000000000 in ?? ()
 No symbol table info available.
 .
 Thread 2 (Thread 0x7f0e0aef3700 (LWP 2648)):
 #0  0x00007f0e16b640fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
 No symbol table info available.
 #1  0x00007f0e1b42b5a7 in ?? ()
 No symbol table info available.
 #2  0x00007f0e1b42bdef in ?? ()
 No symbol table info available.
 #3  0x00007f0e1b416f5b in ?? ()
 No symbol table info available.
 #4  0x00007f0e1b411f60 in ?? ()
 No symbol table info available.
 #5  0x00007f0e1b432f9c in ?? ()
 No symbol table info available.
 #6  0x00007f0e1b430803 in ?? ()
 No symbol table info available.
 #7  0x00007f0e16b5fe9a in start_thread () from 
/lib/x86_64-linux-gnu/libpthread.so.0
 No symbol table info available.
 #8  0x00007f0e147e54bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
 #9  0x0000000000000000 in ?? ()
 No symbol table info available.
 .
 Thread 1 (Thread 0x7f0e1a6ad980 (LWP 2644)):
 #0  0x00007f0e0ea0e2e0 in ?? () from 
/usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
 No symbol table info available.
 #1  <signal handler called>
 No symbol table info available.
 #2  0x00007f0e16b63d84 in pthread_cond_wait@@GLIBC_2.3.2 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
 No symbol table info available.
 #3  0x00007f0e1b42be00 in ?? ()
 No symbol table info available.
 #4  0x00007f0e1b42be24 in ?? ()
 No symbol table info available.
 #5  0x00007f0e1b416f0b in ?? ()
 No symbol table info available.
 #6  0x00007f0e1b411f60 in ?? ()
 No symbol table info available.
 #7  0x00007f0e1b3a85ac in ?? ()
 No symbol table info available.
 #8  0x00007f0e1b3a7cc1 in ?? ()
 No symbol table info available.
 #9  0x00007f0e1b3a7181 in ?? ()
 No symbol table info available.
 #10 0x00007f0e1ac9ef08 in ?? ()
 No symbol table info available.
 #11 0x00007f0e1ac9dd36 in ?? ()
 No symbol table info available.
 #12 0x00007f0e1471476d in __libc_start_main () from 
/lib/x86_64-linux-gnu/libc.so.6
 No symbol table info available.
 #13 0x00007f0e1ac9ee11 in ?? ()
 No symbol table info available.
 #14 0x00007fff81ab6fc8 in ?? ()
 No symbol table info available.
 #15 0x000000000000001c in ?? ()
 No symbol table info available.
 #16 0x0000000000000003 in ?? ()
 No symbol table info available.
 #17 0x00007fff81ab793c in ?? ()
 No symbol table info available.
 #18 0x0000000000000000 in ?? ()
 No symbol table info available.
Title: chromium-browser crashed with SIGSEGV in pthread_cond_wait@@GLIBC_2.3.2()
UpgradeStatus: No upgrade log present (probably fresh install)

I'll download the Chromium debug package and see if I can get a better
stack trace.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to chromium-browser in Ubuntu.
https://bugs.launchpad.net/bugs/1029197

Title:
  chromium-browser crashed with SIGSEGV in
  pthread_cond_wait@@GLIBC_2.3.2()

Status in “chromium-browser” package in Ubuntu:
  Confirmed

Bug description:
  Chromium randomly crashed when alt-tabbing to Terminal, I believe.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.10
  Package: chromium-browser 20.0.1132.47~r144678-0ubuntu2
  ProcVersionSignature: Ubuntu 3.5.0-6.6-generic 3.5.0
  Uname: Linux 3.5.0-6-generic x86_64
  ApportVersion: 2.4-0ubuntu5
  Architecture: amd64
  Date: Wed Jul 25 20:35:24 2012
  Desktop-Session:
   DESKTOP_SESSION = ubuntu-2d
   XDG_CONFIG_DIRS = /etc/xdg/xdg-ubuntu-2d:/etc/xdg
   XDG_DATA_DIRS = 
/usr/share/ubuntu-2d:/usr/share/gnome:/usr/local/share/:/usr/share/
  DiskUsage:
   b'Filesystem     Type      Size  Used Avail Use% Mounted on\n/dev/sda1      
ext4       18G  8.0G  9.1G  47% /\nudev           devtmpfs  993M  4.0K  993M   
1% /dev\ntmpfs          tmpfs     401M  768K  400M   1% /run\nnone           
tmpfs     5.0M     0  5.0M   0% /run/lock\nnone           tmpfs    1002M  200K 
1002M   1% /run/shm\n'
   
   Inodes:
   b'Filesystem     Inodes IUsed IFree IUse% Mounted on\n/dev/sda1        1.2M  
333K  820K   29% /\nudev             249K   464  248K    1% /dev\ntmpfs         
   251K   375  251K    1% /run\nnone             251K     3  251K    1% 
/run/lock\nnone             251K     7  251K    1% /run/shm\n'
  Env:
   MOZ_PLUGIN_PATH = None
   LD_LIBRARY_PATH = None
  ExecutablePath: /usr/lib/chromium-browser/chromium-browser
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120627)
  ProcCmdline: /usr/lib/chromium-browser/chromium-browser\ --type=gpu-process\ 
--channel=2002.18.1313918061
  ProcEnviron:
   
  SegvAnalysis:
   Segfault happened at: 0x7ffc3e258120:        add    %al,(%rax)
   PC (0x7ffc3e258120) in non-executable VMA region: 
0x7ffc3e253000-0x7ffc3e51f000 rw-p None
   source "%al" ok
   destination "(%rax)" (0x00000000) not located in a known VMA region (needed 
writable region)!
  SegvReason:
   executing writable VMA None
   writing NULL VMA
  Signal: 11
  SourcePackage: chromium-browser
  StacktraceTop:
   pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
   ?? ()
   ?? ()
   ?? ()
   ?? ()
  Title: chromium-browser crashed with SIGSEGV in 
pthread_cond_wait@@GLIBC_2.3.2()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  XsessionErrors: gnome-session[1483]: WARNING: Session 'ubuntu' runnable check 
failed: Exited with code 1
  chromium-default: CHROMIUM_FLAGS=""
  gconf-keys: /desktop/gnome/applications/browser/exec = 
b'/usr/bin/chromium-browser\n'/desktop/gnome/url-handlers/https/command = 
b'/usr/bin/chromium-browser %s\n'/desktop/gnome/url-handlers/https/enabled = 
b'true\n'/desktop/gnome/url-handlers/http/command = b'/usr/bin/chromium-browser 
%s\n'/desktop/gnome/url-handlers/http/enabled = 
b'true\n'/desktop/gnome/session/required_components/windowmanager = 
b''/apps/metacity/general/compositing_manager = 
b'true\n'/desktop/gnome/interface/icon_theme = 
b'ubuntu-mono-dark\n'/desktop/gnome/interface/gtk_theme = b'Ambiance\n'

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