Was able to open the problematic file by reconfiguring Kwrite and changing the default encoding to UTF-8 and the fallback encoding to UTF-16 (Kwrite keeps changing UTF-16 to ucs2 but whatever).
That's a good news for me, of course, but still I feel Kwrite shouldn't crash like that even if the default and fallback encoding do not match the file's encoding. In Wheezy I sometimes would open a binary file with Kwrite and I don't even remember when Kwrite crashed like that, if it ever did. Regards,
