Bug 144317 – gnome-terminal crashes during two simultaneous tab operations

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Bug 144317 - gnome-terminal crashes during two simultaneous tab operations


Summary:	gnome-terminal crashes during two simultaneous tab operations


Status:	RESOLVED DUPLICATE of bug 134800

Product:	gnome-terminal
Classification:	Core
Component:	general
Version:	2.6.x
Hardware:	Other Linux

Importance:	Low minor
Target Milestone:	---
Assigned To:	GNOME Terminal Maintainers
QA Contact:	GNOME Terminal Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2004-06-14 10:54 UTC by Stanislav Brabec
Modified:	2004-12-22 21:47 UTC

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

Description Stanislav Brabec 2004-06-14 10:54:38 UTC

Description of the crash:
Opening new tab in exactly the same moment another tab (one of two
existing) in the same window is closed, sometimes causes a crash.

Steps to reproduce the crash:
1. Open gnome-terminal window with two tabs.
2. sleep 1 ; exit
3. Wait a little, then press Ctrl+Alt+T

Expected Results:
Two tabs.

How often does this happen?
Very rare, hard to repeat.

Debugging Information:

Backtrace was generated from '/opt/gnome/bin/gnome-terminal'

(no debugging symbols found)...Using host libthread_db library
"/lib/tls/libthread_db.so.1".
(no debugging symbols found)...(no debugging symbols found)...(no
debugging symbols found)...(no debugging symbols found)...(no debugging
symbols found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...[Thread debugging using libthread_db enabled]
[New Thread 1089622528 (LWP 3585)]
(no debugging symbols found)...(no debugging symbols found)...(no
debugging symbols found)...(no debugging symbols found)...(no debugging
symbols found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...0xffffe410 in ?? ()

+ Trace 47130

Thread 1 (Thread 1089622528 (LWP 3585))

#0 ??
#1 ??
#2 ??
#3 ??
#4 __waitpid_nocancel
from /lib/tls/libpthread.so.0
#5 gnome_init_with_popt_table
from /opt/gnome/lib/libgnomeui-2.so.0
#6 <signal handler called>
#7 _vte_draw_get_char_width
from /opt/gnome/lib/libvte.so.4
#8 vte_invalidate_cursor_once
from /opt/gnome/lib/libvte.so.4
#9 vte_terminal_im_preedit_changed
from /opt/gnome/lib/libvte.so.4
#10 g_cclosure_marshal_VOID__VOID
from /opt/gnome/lib/libgobject-2.0.so.0
#11 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#12 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#13 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#14 g_signal_emit_by_name
from /opt/gnome/lib/libgobject-2.0.so.0
#15 gtk_im_multicontext_append_menuitems
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#16 g_cclosure_marshal_VOID__VOID
from /opt/gnome/lib/libgobject-2.0.so.0
#17 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#18 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#19 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#20 g_signal_emit_by_name
from /opt/gnome/lib/libgobject-2.0.so.0
#21 gtk_im_context_simple_new
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#22 gtk_im_context_simple_new
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#23 gtk_im_context_reset
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#24 gtk_im_multicontext_new
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#25 gtk_im_context_reset
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#26 vte_terminal_im_reset
from /opt/gnome/lib/libvte.so.4
#27 vte_terminal_unrealize
from /opt/gnome/lib/libvte.so.4
#28 g_cclosure_marshal_VOID__VOID
from /opt/gnome/lib/libgobject-2.0.so.0
#29 g_type_class_meta_marshal
from /opt/gnome/lib/libgobject-2.0.so.0
#30 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#31 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#32 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#33 g_signal_emit
from /opt/gnome/lib/libgobject-2.0.so.0
#34 gtk_widget_unrealize
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#35 gtk_box_pack_start_defaults
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#36 gtk_container_forall
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#37 gtk_widget_freeze_child_notify
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#38 g_cclosure_marshal_VOID__VOID
from /opt/gnome/lib/libgobject-2.0.so.0
#39 g_type_class_meta_marshal
from /opt/gnome/lib/libgobject-2.0.so.0
#40 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#41 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#42 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#43 g_signal_emit
from /opt/gnome/lib/libgobject-2.0.so.0
#44 gtk_widget_unrealize
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#45 gtk_widget_unparent
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#46 gtk_notebook_set_tab_label_text
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#47 gtk_notebook_new
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#48 g_cclosure_marshal_VOID__OBJECT
from /opt/gnome/lib/libgobject-2.0.so.0
#49 g_type_class_meta_marshal
from /opt/gnome/lib/libgobject-2.0.so.0
#50 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#51 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#52 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#53 g_signal_emit
from /opt/gnome/lib/libgobject-2.0.so.0
#54 gtk_container_remove
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#55 terminal_window_remove_screen
#56 terminal_screen_close
#57 g_cclosure_marshal_VOID__VOID
from /opt/gnome/lib/libgobject-2.0.so.0
#58 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#59 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#60 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#61 g_signal_emit_by_name
from /opt/gnome/lib/libgobject-2.0.so.0
#62 vte_terminal_catch_child_exited
from /opt/gnome/lib/libvte.so.4
#63 _vte_marshal_VOID__INT_INT
from /opt/gnome/lib/libvte.so.4
#64 g_closure_invoke
from /opt/gnome/lib/libgobject-2.0.so.0
#65 signal_emit_unlocked_R
from /opt/gnome/lib/libgobject-2.0.so.0
#66 g_signal_emit_valist
from /opt/gnome/lib/libgobject-2.0.so.0
#67 g_signal_emit_by_name
from /opt/gnome/lib/libgobject-2.0.so.0
#68 vte_reaper_emit_signal
from /opt/gnome/lib/libvte.so.4
#69 g_io_unix_dispatch
from /opt/gnome/lib/libglib-2.0.so.0
#70 g_main_context_dispatch
from /opt/gnome/lib/libglib-2.0.so.0
#71 g_main_context_iterate
from /opt/gnome/lib/libglib-2.0.so.0
#72 g_main_loop_run
from /opt/gnome/lib/libglib-2.0.so.0
#73 gtk_main
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#74 ??
#75 ??
#76 ??
#77 ??
#78 ??
#79 ??
#80 ??
#81 ??
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#82 ??
#83 ??
#84 ??
#85 ??
#86 _dl_runtime_resolve
from /lib/ld-linux.so.2
#87 main
#0 ??

Comment 1 Mariano Suárez-Alvarez 2004-07-01 23:14:39 UTC

I have spent a while opening and closing tabs and I cannot reproduce this.
If you can, could you please recompile gnome-terminal so that we have debugging
symbols and get a 'backtrace full' backtrace from gdb?

Comment 2 Stanislav Brabec 2004-07-02 10:21:05 UTC

Not able to repeat. Race condition time seems to be too short.

My guess is race condition somewhere in terminal_window_add_screen(), 
terminal_window_remove_screen(), update_notebook() or gtk_notebook_set_show_*().
Especially strange is, that terminal_window_remove_screen() was running in both
threads.

+ Trace 47299

#54 gtk_container_remove
from /opt/gnome/lib/libgtk-x11-2.0.so.0
#55 terminal_window_remove_screen
#56 terminal_screen_close
#47 gtk_notebook_new
from ...
#54 gtk_container_remove
#55 terminal_window_remove_screen
#56 terminal_screen_close


I am not oriented in code, but there can be races in manipulation with
window->priv->terms and window->priv->active_term without locking or unref()
before actual disappearing from all structures.

Comment 3 Olav Vitters 2004-07-08 22:54:34 UTC

Thanks for the bug report. This particular bug has already been reported into
our bug tracking system, but please feel free to report any further bugs you find.

Note: full backtrace in other bug

*** This bug has been marked as a duplicate of 134800 ***