Bug 471316 – Crash in smooth scrolling code

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Bug 471316 - Crash in smooth scrolling code


Summary:	Crash in smooth scrolling code


Status:	RESOLVED FIXED

Product:	gossip
Classification:	Deprecated
Component:	General
Version:	0.27
Hardware:	Other All

Importance:	Normal critical
Target Milestone:	---
Assigned To:	Gossip Maintainers
QA Contact:	Gossip Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2007-08-28 21:38 UTC by Sam Morris
Modified:	2007-10-31 21:58 UTC

See Also:
GNOME target:	---
GNOME version:	---

Description Sam Morris 2007-08-28 21:38:58 UTC

Steps to reproduce:
I can't reproduce this at will, but after running Gossip for a few hours it always happens.

The crash seems to happen when I send or recieve a message that causes a window to scroll smoothly.

Stack trace:
(gdb) run
Starting program: /usr/bin/gossip 
[Thread debugging using libthread_db enabled]
[New Thread -1227651392 (LWP 8095)]

(gossip:8095): GLib-GObject-WARNING **: instance of invalid non-instantiatable type `<invalid>'

(gossip:8095): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `GtkTextView'

Program received signal SIGSEGV, Segmentation fault.

+ Trace 158676

Thread NaN (LWP 8095)

#0 chat_view_scroll_cb
at gossip-chat-view.c line 1072
#1 ??
from /usr/lib/libglib-2.0.so.0
#2 ??
#3 __pthread_mutex_unlock_usercnt
at pthread_mutex_unlock.c line 31
#4 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#5 ??
from /usr/lib/libglib-2.0.so.0
#6 ??
#7 ??



Other information:

Comment 1 Norbert Tretkowski 2007-09-12 19:11:58 UTC

I'm seeing the same crash on Debian testing with Gossip 0.27 (but not with the same Release of Gossip on Ubuntu 7.04), it makes Gossip nearly unusable.

Comment 2 Sam Morris 2007-10-07 23:40:43 UTC

I can provoke this crash by closing the chat window while the scrolling animation is still taking place.

Comment 3 Sam Morris 2007-10-07 23:50:31 UTC

Better backtrace:

$ gossip

(gossip:10070): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width > 0' failed

(gossip:10070): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

<here is where I trigger the crash>

(gossip:10070): GLib-GObject-CRITICAL **: g_type_instance_get_private: assertion `instance != NULL && instance->g_class != NULL' failed

(gossip:10070): GLib-GObject-WARNING **: invalid unclassed pointer in cast to `GtkTextView'
Cannot access memory at address 0x4
Cannot access memory at address 

Backtrace from bug-buddy:

Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 0xb6cb06c0 (LWP 10142)]
0xffffe410 in __kernel_vsyscall ()

+ Trace 168641

Thread 1 (Thread 0xb6cb06c0 (LWP 10142))

#0 __kernel_vsyscall
#1 __waitpid_nocancel
from /lib/i686/cmov/libpthread.so.0
#2 libgnomeui_segv_handle
at gnome-ui-init.c line 872
#3 <signal handler called>
#4 chat_view_scroll_cb
at gossip-chat-view.c line 1072
#5 g_timeout_dispatch
at /tmp/buildd/glib2.0-2.14.1/glib/gmain.c line 3488
#6 IA__g_main_context_dispatch
at /tmp/buildd/glib2.0-2.14.1/glib/gmain.c line 2061
#7 g_main_context_iterate
at /tmp/buildd/glib2.0-2.14.1/glib/gmain.c line 2694
#8 IA__g_main_loop_run
at /tmp/buildd/glib2.0-2.14.1/glib/gmain.c line 2898
#9 IA__gtk_main
at /tmp/buildd/gtk+2.0-2.12.0/gtk/gtkmain.c line 1144
#10 main
at gossip-main.c line 208
#0 __kernel_vsyscall

Comment 4 Richard Hult 2007-10-31 21:06:22 UTC

Fixed in svn now.

Comment 5 Norbert Tretkowski 2007-10-31 21:58:25 UTC

Confirmed, thanks!