[Bug 831620] New: /usr/lib64/mozc/mozc_renderer crashed only once with Segmentation fault in ___vsnprintf_chk (s=0x0, maxlen=<optimized out>, flags=1, slen=<optimized out>, format=0x7f8405c30cc5 "%s%s", args=args@entry=0x7f83fc8c5f58) at vsnprintf_chk.c:55 .