a bug make c::b crash.
1) open a workspace, and open some files.
2) click a main menu item
3) and move mouse over a menu item above, and let the mouse and also on a file TAB and above.
3) wait the hint window show.
4) wait a moment, or make mouse move away...
will see the c::b crash.
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win7 c::b svn 6992.
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addition : before c::b crash, it's window turn white.