diff -pruN anthy-9100h.orig/src-diclib/xstr.c anthy-9100h/src-diclib/xstr.c
--- anthy-9100h.orig/src-diclib/xstr.c 2009-01-23 12:31:31.000000000 +0900
+++ anthy-9100h/src-diclib/xstr.c 2013-06-17 19:30:08.000000000 +0900
@@ -384,6 +384,10 @@ int
anthy_xstrcmp(xstr *x1, xstr *x2)
{
int i, m;
+ if (!x1)
+ return -1;
+ if (!x2)
+ return 1;
if (x1->len < x2->len) {
m = x1->len;
}else{