@eranon
hello,
I never saw this message.
In the extraction I use 'xgettext.exe' from 'Poedit', so this can only come from the utility (GPLed).
Waiting to try another version of 'xgettext.exe', we must find the offending text.
Analyzing the *. lst you can locate the string involved ? because normally there should be warnings.
I'll do some tests, writing erroneous texts!
Cordially.
PS : Is "Code::Blocks' crash?
Can you temporarily remove 'msmerge.exe' and 'wxrc.exe?', and we will be sure that it is 'xgettex.exe' the culprit.