add check return valueof ONIGENC_CODE_TO_MBCLEN()

diff --git a/src/regcomp.c b/src/regcomp.c
index ff3431f03645f540350a26f07c52d59141a6ba13..6a290660ff8a5c1322576771337fc4b2432ad5e2 100644 (file)
--- a/src/regcomp.c
+++ b/src/regcomp.c
@@ -6681,6 +6681,7 @@ onig_is_code_in_cc(OnigEncoding enc, OnigCodePoint code, CClassNode* cc)
   }
   else {
     len = ONIGENC_CODE_TO_MBCLEN(enc, code);
+    if (len < 0) return 0;
   }
   return onig_is_code_in_cc_len(len, code, cc);
 }