@@ -1285,10 +1285,13 @@ proceed_next_node (const re_match_context_t *mctx, Idx nregs, regmatch_t *regs,
if (type == OP_BACK_REF)
{
Idx subexp_idx = dfa->nodes[node].opr.idx + 1;
- naccepted = regs[subexp_idx].rm_eo - regs[subexp_idx].rm_so;
+ if (subexp_idx < nregs)
+ naccepted = regs[subexp_idx].rm_eo - regs[subexp_idx].rm_so;
if (fs != NULL)
{
- if (regs[subexp_idx].rm_so == -1 || regs[subexp_idx].rm_eo == -1)
+ if (subexp_idx >= nregs
+ || regs[subexp_idx].rm_so == -1
+ || regs[subexp_idx].rm_eo == -1)
return -1;
else if (naccepted)
{