Ubuntu
gnome-mplayer package

gnome-mplayer crashed with SIGSEGV in g_async_queue_length()

Bug #420546 reported by Caracuri on 2009-08-28

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	gnome-mplayer (Ubuntu)	Fix Released	Medium	Unassigned

Bug Description

Binary package hint: gnome-mplayer

crashed

ProblemType: Crash
Architecture: i386
Date: Fri Aug 28 15:41:56 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/gnome-mplayer
NonfreeKernelModules: nvidia
Package: gnome-mplayer 0.9.7-1 [modified: usr/bin/gnome-mplayer]
ProcCmdline: /usr/bin/gnome-mplayer --window=132270635 --controlid=8391 --width=1280 --height=564 --autostart=1 --showcontrols=1
ProcEnviron:
LANGUAGE=it_IT:it:en_GB:en
LANG=it_IT.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-8.28-generic
SegvAnalysis:
Segfault happened at: 0x4ab6f775 <g_async_queue_length+37>: mov 0x14(%esi),%ecx
PC (0x4ab6f775) ok
source "0x14(%esi)" (0x0000001c) not located in a known VMA region (needed readable region)!
destination "%ecx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-mplayer
StacktraceTop:
g_async_queue_length () from /usr/lib/libglib-2.0.so.0
g_thread_pool_unprocessed () from /usr/lib/libglib-2.0.so.0
?? ()
?? ()
?? () from /usr/lib/libglib-2.0.so.0
Title: gnome-mplayer crashed with SIGSEGV in g_async_queue_length()
Uname: Linux 2.6.31-8-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin netdev plugdev pulse pulse-access sambashare scanner video

Tags:

Related branches

lp:debian/gnome-mplayer

lp:ubuntu/karmic/gnome-mplayer

Revision history for this message

Caracuri (caracuri) wrote on 2009-08-28:

Dependencies.txt Edit (13.3 KiB, text/plain; charset="utf-8")
Disassembly.txt Edit (988 bytes, text/plain; charset="utf-8")
ProcMaps.txt Edit (34.3 KiB, text/plain; charset="utf-8")
ProcStatus.txt Edit (796 bytes, text/plain; charset="utf-8")
Registers.txt Edit (470 bytes, text/plain; charset="utf-8")
Stacktrace.txt Edit (637 bytes, text/plain; charset="utf-8")
ThreadStacktrace.txt Edit (663 bytes, text/plain; charset="utf-8")

Revision history for this message

Apport retracing service (apport) wrote on 2009-08-28: Stacktrace.txt (retraced)

Stacktrace.txt (retraced) Edit (2.5 KiB, text/plain)

StacktraceTop:IA__g_async_queue_length (queue=0x8)
IA__g_thread_pool_unprocessed (pool=0x88c8460)
delete_callback (widget=0x0, event=0x0, data=0x0)
set_quit (data=0x873a460) at gui.c:1169
g_idle_dispatch (source=0x89ad500, callback=0x8,

Revision history for this message

Apport retracing service (apport) wrote on 2009-08-28: ThreadStacktrace.txt (retraced)

ThreadStacktrace.txt (retraced) Edit (2.5 KiB, text/plain)

Changed in gnome-mplayer (Ubuntu):
importance:	Undecided → Medium
tags:	removed: need-i386-retrace

Cesare Tirabassi (norsetto) on 2009-09-01

visibility:

private → public

Revision history for this message

Cesare Tirabassi (norsetto) wrote on 2009-09-01:

Can you perhaps give a description of what you were doing that caused the crash? All I can see from the backtrace is that you just launched gnome-mplayer and then quit it.

Changed in gnome-mplayer (Ubuntu):
status:	New → Incomplete

Revision history for this message

Kevin DeKorte (kdekorte-gmail) wrote on 2009-09-02:

I think the reporter has a flag set to crash/abort on warning. I believe the problem is caused when used as a plugin and no metadata was ever parsed. I'll see if I can suppress this warning.

Cesare Tirabassi (norsetto) on 2009-09-02

Changed in gnome-mplayer (Ubuntu):
assignee:	nobody → Kevin DeKorte (kdekorte-gmail)
status:	Incomplete → In Progress

Revision history for this message

Kevin DeKorte (kdekorte-gmail) wrote on 2009-09-02:

I believe the reporter of this issue has the environment variable

export G_DEBUG=fatal_warnings

set. However, what is happening is that gnome-mplayer is shutting down and trying to gracefully shutdown the threadpool for retrieving metadata. But gtk is not handling a empty/flushed pool correctly and issuing the error.

I put in a workaround to not call this function when running under the control of gecko-mediaplayer

Index: src/gui.c
===================================================================
--- src/gui.c (revision 1526)
+++ src/gui.c (working copy)
@@ -1374,16 +1374,21 @@
}

mplayer_shutdown();
- g_thread_pool_stop_unused_threads();
- while (gtk_events_pending() || thread != NULL
- || g_thread_pool_unprocessed(retrieve_metadata_pool)) {
- gtk_main_iteration();
- }
- g_thread_pool_free(retrieve_metadata_pool, TRUE, TRUE);

- if (control_id != 0)
+ if (control_id == 0) {
+ g_thread_pool_stop_unused_threads();
+ while (gtk_events_pending() || thread != NULL
+ || g_thread_pool_unprocessed(retrieve_metadata_pool)) {
+ gtk_main_iteration();
+ }
+ g_thread_pool_free(retrieve_metadata_pool, TRUE, TRUE);
+ } else {
+ while (gtk_events_pending() || thread != NULL) {
+ gtk_main_iteration();
+ }
dbus_cancel();
-
+ }
+
dbus_unhook();

Revision history for this message

Kevin DeKorte (kdekorte-gmail) wrote on 2009-09-02:

Should fix crash/warning Edit (939 bytes, text/plain)

Cesare Tirabassi (norsetto) on 2009-09-02

Changed in gnome-mplayer (Ubuntu):
assignee:	Kevin DeKorte (kdekorte-gmail) → nobody
status:	In Progress → Fix Committed

Revision history for this message

Launchpad Janitor (janitor) wrote on 2009-09-23:

This bug was fixed in the package gnome-mplayer - 0.9.8-1

---------------
gnome-mplayer (0.9.8-1) unstable; urgency=low

  * New upstream bug-fix only release (LP: #420546)
  * Remove all previous patches, now applied upstream
  * Add --with-flat-volume flag to configure call
  * Add patches/updated_el_translation.patch:
    Update last greek translations from launchpad
  * Add patches/fix_gtk2.14_ftbfs.patch:
    Add GTK2.14 compile defs to gtk_widget_get_window; useful for backports
    Change minimum required libgtk version back to 2.12.0
  * Add README.source since the package uses quilt as a patch management
    system.