diff options
Diffstat (limited to 'regexec.c')
| -rw-r--r-- | regexec.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -966,7 +966,8 @@ S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *sta else { U8 *r = reghop3((U8*)s, -1, (U8*)startpos); - tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); + if (s > (char*)r) + tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); } tmp = ((OP(c) == BOUND ? isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); @@ -1009,7 +1010,8 @@ S_find_byclass(pTHX_ regexp * prog, regnode *c, char *s, char *strend, char *sta else { U8 *r = reghop3((U8*)s, -1, (U8*)startpos); - tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); + if (s > (char*)r) + tmp = (I32)utf8n_to_uvchr(r, s - (char*)r, 0, 0); } tmp = ((OP(c) == NBOUND ? isALNUM_uni(tmp) : isALNUM_LC_uvchr(UNI_TO_NATIVE(tmp))) != 0); |