Huge stack trace on exception

[Bug Importer]

In some (rare) cases, Coccinella catch some exception and opens dialog with
some technical information about error.

The problem is the text of message is very big and it doesn't fit into my
window. I see only fragment of text, neither caption of dialog nor 'Ok'
button in it - they both are out of screen. Dialog box is very, very big. I
think there displays stack trace of program or some other techincal info,
but I'm not sure.

May be this box is displayed not by Coccinella itself, but by Tcl.
Nethertheless, such exception should be catched and displayed in more
friendly manner - may be with some scrolling of error text or...

Now it's sometimes difficult to even close such dialog box - one should
click it with a mouse (or hit Ctrl+Tab several times) to make it focus and
then press Enter. The box dissapears and everything then works okay. But
not every user can do such a cleanup, it's not evident.

I use latest version of Coccinella (0.95.16) and Windows XP SP2 with
russian MUI.