Description of problem:
Right clicked on a table in an unsaved model and chose Copy SQL to clipboard. Failed 50% of the time.

Version-Release number of selected component:
mysql-workbench-5.2.46-1.fc18

Additional info:
backtrace_rating: 4
cmdline:        /usr/libexec/mysql-workbench-bin
crash_function: x86_64_fallback_frame_state
executable:     /usr/libexec/mysql-workbench-bin
kernel:         3.7.9-201.fc18.x86_64
remote_result:  NOTFOUND
uid:            1000
var_log_messages: Feb 25 06:41:57 beech abrt[10258]: Saved core dump of pid 10106 (/usr/libexec/mysql-workbench-bin) to /var/tmp/abrt/ccpp-2013-02-25-06:41:56-10106 (113643520 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 x86_64_fallback_frame_state at ./md-unwind-support.h:53
 #1 uw_frame_state_for at ../../../libgcc/unwind-dw2.c:1187
 #2 _Unwind_Backtrace at ../../../libgcc/unwind.inc:290
 #3 __backtrace at ../sysdeps/x86_64/backtrace.c:109
 #4 catch_segfault at ../debug/segfault.c:101
 #6 ??
 #7 wb::HistoryTree::refresh at model/wb_history_tree.cpp:64
 #8 operator() at /usr/include/boost/function/function_template.hpp:760
 #9 m_invoke at /usr/include/boost/signals2/detail/signal_template.hpp:363
 #10 operator() at /usr/include/boost/signals2/detail/signal_template.hpp:345

Potential duplicate: bug 909865