[Lazarus] Find in files crashes Cinnamon

[Juha Manninen]

Find in Files has some problem although it has not frozen the whole
desktop earlier. There was a report from Jonas years ago:
 https://bugs.freepascal.org/view.php?id=24351
but it could not be reproduced and was finally resolved.
There is also a more recent report:
 https://bugs.freepascal.org/view.php?id=29925
Now I realized its backtrace mentions "exttools.pas". It may be
related to this new report about LazBuild:
 https://bugs.freepascal.org/view.php?id=36318
where the bug is in external tool thread synchronization.

I have another problem with Find in Files sometimes. The dialog gets
wrong initial text. See:
 https://bugs.freepascal.org/view.php?id=34254
It may well be related because it happens so randomly.

Juha