is in work. The crash doesn't happen if $LANG is set to *.ISO8859-* or
to *.KOI8-R. It happens with $LANG=C, US_ASCII, *.KOI8-U, *.Big5 etc.
The function which does crash should select the best suitable mime encoding
type for $LANG.
The workaround is to default to US-ASCII if there is no suitable entry.
If the entry has been modified in the settings, this value will not be used
anymore and the crash should even stop if we don't have this workaround
in place.
