[Lazarus] Find in files crashes Cinnamon

[Florian Klämpfl]

Recently, I tried again to work with Linux Mint when developing FPC. For 
FPC development I use normally lazarus from trunk, typical updated very 
few weeks. For navigation in the code I use "Find in files" from time to 
time, e.g. when looking where a certain internal error is thrown. I call 
the Find in files dialog by Ctrl-Shift-F. Sometimes, this action crashes 
Cinnamon completely: mouse still works but nothing is clickable anymore 
(Ctrl-Alt-Fx still works so the kernel is apparently still fine). Often, 
Ctrl-Alt-Esc can be used to restart Cinnamon after some time, sometimes 
Cinnamon de-freezes after some second and shows a dialog box that it 
crashed, restarted and is now in safe mode (or how it is called). The 
most annoying part of these crashes is that all windows are moved to the 
first virtual desktop besides that the fact that sometimes only a reboot 
helps to recover.

Does anybody have an idea where this could come from or how I could 
track this down (and no, the normal answer one gets when asking such 
things about linux that I should try KDE or Gnome or any other of the 
umpteen desktops, is not a solution).