show_mb
werr("utf8 encoding too large (%s)", show_mb(mb));
werr("incomplete utf8 sequence (%s)", show_mb(mb));
werr("illegal redundant utf8 encoding (%s)", show_mb(mb));
werr("incomplete character sequence (%s)", show_mb(mb));
werr("incomplete character sequence (%s)", show_mb(mb));
show_mb(mb));
werr("incomplete character sequence (%s)", show_mb(mb));
werr("incomplete character sequence (%s)", show_mb(mb));