New subject: [Fedora-i18n-bugs] [Bug 892359] segfault in pango_font_description_hash()

Sunday, 6 January 2013

Product: Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=892359

            Bug ID: 892359
           Summary: transmission-gt[1948]: segfault at 1 ip
                    000000322fa14443 sp 00007fff45fb16a8 error 4 in
                    libpango-1.0.so.0.3200.3[322fa00000+49000]
           Product: Fedora
           Version: 18
         Component: pango
          Severity: unspecified
          Priority: unspecified
          Reporter: kparal(a)redhat.com

Description of problem:
Recently the transmission application started to either crash or display
graphical glitches. If I try to open any dialog (application preferences,
torrent details), one of these three things happen at random:
1) dialog is displayed fine
2) application crashes
3) I see a large black rectangle of huge proportions (e.g. 10000x10000 px). If
I shrink the black rectangle to a reasonable size, it redraws into a working
dialog. It is black in those huge proportions probably because my Intel video
card can't render such large windows.

When it crashes, I see this in dmesg:

...
 transmission-gt[1948]: segfault at 1 ip 000000322fa14443 sp
00007fff45fb16a8 error 4 in libpango-1.0.so.0.3200.3[322fa00000+49000] 
Abrt doesn't kick in, so I enabled coredump creation manually and extracted the
backtrace. It seems to be a crash in pango:

...
 (gdb) bt
 #0  0x000000322fa14443 in pango_font_description_hash () from /lib64/libpango-1.0.so.0
 #1  0x000000322f2094d9 in pango_fc_fontset_key_hash () from /lib64/libpangoft2-1.0.so.0
 #2  0x00000038af637c99 in g_hash_table_lookup () from /lib64/libglib-2.0.so.0
 #3  0x000000322f20a8be in pango_fc_font_map_load_fontset () from
/lib64/libpangoft2-1.0.so.0
 #4  0x00007fed50a9c851 in pk_pango_fc_font_map_load_fontset () from
/usr/lib64/gtk-3.0/modules/libpk-gtk-module.so
 #5  0x000000322fa1a791 in itemize_state_process_run () from /lib64/libpango-1.0.so.0
 #6  0x000000322fa1ab3a in itemize_with_font.constprop.4 () from /lib64/libpango-1.0.so.0
 #7  0x000000322fa1b593 in pango_context_get_metrics () from /lib64/libpango-1.0.so.0
 #8  0x00000039312f0649 in gtk_combo_box_get_preferred_width () from /lib64/libgtk-3.so.0
 #9  0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #10 0x00000039312b5685 in gtk_box_get_size () from /lib64/libgtk-3.so.0
 #11 0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #12 0x000000393135849e in gtk_grid_request_run () from /lib64/libgtk-3.so.0
 #13 0x00000039313587ad in gtk_grid_get_size () from /lib64/libgtk-3.so.0
 #14 0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #15 0x00000039313b8f0d in gtk_notebook_size_request () from /lib64/libgtk-3.so.0
 #16 0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #17 0x00000039312b5685 in gtk_box_get_size () from /lib64/libgtk-3.so.0
 #18 0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #19 0x00000039314cf02a in gtk_window_get_preferred_width () from /lib64/libgtk-3.so.0
 #20 0x000000393140ac5a in compute_size_for_orientation () from /lib64/libgtk-3.so.0
 #21 0x000000393140b28e in gtk_widget_get_preferred_size () from /lib64/libgtk-3.so.0
 #22 0x00000039314cff10 in gtk_window_compute_configure_request () from
/lib64/libgtk-3.so.0
 #23 0x00000039314d22c1 in gtk_window_show () from /lib64/libgtk-3.so.0
 #24 0x00000038afa0f910 in g_closure_invoke () from /lib64/libgobject-2.0.so.0
 #25 0x00000038afa20633 in signal_emit_unlocked_R () from /lib64/libgobject-2.0.so.0
 #26 0x00000038afa28c8d in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
 #27 0x00000038afa28de2 in g_signal_emit () from /lib64/libgobject-2.0.so.0
 #28 0x00000039314c7239 in gtk_widget_show () from /lib64/libgtk-3.so.0
 #29 0x00000000004310b6 in show_details_dialog_for_selected_torrents (data=0x7fff45fb4460)
at main.c:173
 #30 gtr_actions_handler (action_name=<optimized out>, user_data=0x7fff45fb4460) at
main.c:1540
 #31 0x00000038afa0f910 in g_closure_invoke () from /lib64/libgobject-2.0.so.0
 #32 0x00000038afa20d08 in signal_emit_unlocked_R () from /lib64/libgobject-2.0.so.0
 #33 0x00000038afa28c8d in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
 #34 0x00000038afa28de2 in g_signal_emit () from /lib64/libgobject-2.0.so.0
 #35 0x000000393129a838 in _gtk_action_emit_activate () from /lib64/libgtk-3.so.0
 #36 0x000000393146bec9 in button_clicked () from /lib64/libgtk-3.so.0
 #37 0x00000038afa0fbd7 in _g_closure_invoke_va () from /lib64/libgobject-2.0.so.0
 #38 0x00000038afa283a8 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
 #39 0x00000038afa28de2 in g_signal_emit () from /lib64/libgobject-2.0.so.0
 #40 0x00000039312c1118 in gtk_real_button_released () from /lib64/libgtk-3.so.0
 #41 0x00000038afa0f910 in g_closure_invoke () from /lib64/libgobject-2.0.so.0
 #42 0x00000038afa20633 in signal_emit_unlocked_R () from /lib64/libgobject-2.0.so.0
 #43 0x00000038afa28c8d in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
 #44 0x00000038afa28de2 in g_signal_emit () from /lib64/libgobject-2.0.so.0
 #45 0x00000039312bfe83 in gtk_button_button_release () from /lib64/libgtk-3.so.0
 #46 0x000000393138edef in _gtk_marshal_BOOLEAN__BOXEDv () from /lib64/libgtk-3.so.0
 #47 0x00000038afa0fbd7 in _g_closure_invoke_va () from /lib64/libgobject-2.0.so.0
 #48 0x00000038afa283a8 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0
 #49 0x00000038afa28de2 in g_signal_emit () from /lib64/libgobject-2.0.so.0
 #50 0x00000039314bccde in gtk_widget_event_internal () from /lib64/libgtk-3.so.0
 #51 0x000000393138ccee in propagate_event () from /lib64/libgtk-3.so.0
 #52 0x000000393138e9b3 in gtk_main_do_event () from /lib64/libgtk-3.so.0
 #53 0x0000003931a4a822 in gdk_event_source_dispatch () from /lib64/libgdk-3.so.0
 #54 0x00000038af647a75 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
 #55 0x00000038af647da8 in g_main_context_iterate.isra.24 () from /lib64/libglib-2.0.so.0
 #56 0x00000038af647e64 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
 #57 0x00000038b0e9a7ec in g_application_run () from /lib64/libgio-2.0.so.0
 #58 0x0000000000421759 in main (argc=1, argv=0x7fff45fb4758) at main.c:668 
I have the core file available if it helps.

I tried to downgrade transmission, xorg-x11-server-Xorg, xorg-x11-drv-intel,
but nothing helps. I can't downgrade pango, it's the only version available in
F18.

But I believe I have used transmission quite a few times some weeks ago and I
never saw this problem.

Version-Release number of selected component (if applicable):
pango-1.32.3-1.fc18.x86_64
transmission-gtk-2.75-1.fc18.x86_64
xorg-x11-drv-intel-2.20.17-1.fc18.x86_64
xorg-x11-server-Xorg-1.13.1-1.fc18.x86_64

How reproducible:
easily

Steps to Reproduce:
1. start transmission
2. if you have some torrent, select it and repeat: open its properties window,
close it, open it again, close it, ...
3. alternatively you can do the same with transmission preferences window
4. after a few attempts you should see either a big black rectangle covering
the whole screen or program crash

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[Fedora-i18n-bugs] [Bug 892359] New: transmission-gt[1948]: segfault at 1 ip 000000322fa14443 sp 00007fff45fb16a8 error 4 in libpango-1.0.so.0.3200.3[322fa00000+49000]