Comment 2 for bug 1293200

StacktraceTop:
 fast_validate (str=<optimized out>) at /build/buildd/glib2.0-2.39.91/./glib/gutf8.c:1461
 g_utf8_validate (str=str@entry=0x0, max_len=max_len@entry=-1, end=end@entry=0x0) at /build/buildd/glib2.0-2.39.91/./glib/gutf8.c:1629
 strdup_len (string=0x0, len=-1, bytes_written=0x0, bytes_read=0x0, error=0x0) at /build/buildd/glib2.0-2.39.91/./glib/gconvert.c:837
 g_locale_to_utf8 (opsysstring=0x0, len=len@entry=-1, bytes_read=bytes_read@entry=0x0, bytes_written=bytes_written@entry=0x0, error=error@entry=0x0) at /build/buildd/glib2.0-2.39.91/./glib/gconvert.c:905
 _g_error_new_from_archive_error (s=<optimized out>) at fr-archive-libarchive.c:277