abrt 1.1.0 detected a crash.
Attached file: backtrace
cmdline: /usr/bin/perl /usr/bin/padre
comment: See "How to reproduce" for instructions. I verified this twice. Problem does not occur when run locally.
reason: Process /usr/bin/perl was killed by signal 11 (SIGSEGV)
release: Fedora release 13 (Goddard)
How to reproduce
1. Start Hummingbird Exceed 220.127.116.11 on a Windows XP system
2. SSH into a Fedora 13 system with X11 tunnelling enabled using PuTTY
3. Start padre, loading a perl5 source file (e.g. "padre dbi-test.pl")
4. Select a module name such as "DBI" and press F2
Created attachment 419037 [details]
Cannot reproduce on Linux to Linux (Xorg, putty or openssh for Linux, Fedora 13).
Can you trigger the segfault always or is it random? Does it occur only when pressing F2 to open new window with help for given module or can you crash Padre with opening any other window?
It looks more like gtk2 bug with interaction to Hummingbird Exceed X11 server.
It segfaulted here:
0x0000003deb46b954 <+36>: callq 0x3deb41c658 <g_type_check_instance_cast@plt>
=> 0x0000003deb46b959 <+41>: mov 0x440(%rax),%rsi
That means the gtk2 library tried to dereference return code of g_type_check_instance_cast@plt function at offset 0x440. And because rax was zero, the effective read address was 0x440. According memory mapping list, zeroth page was unmapped.
Thus it's simple NULL pointer dereference in libgtk2++. I will check _gdk_x11_screen_process_owner_change() code in gdkscreen-x11.c later.
This bug is tracked by upstream probably already: https://bugzilla.gnome.org/show_bug.cgi?id=609126
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