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suppress backref processing in ERE regcomp

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one of the features of ERE is that it's actually a regular language
and does not admit expressions which cannot be matched in linear time.
introduction of \n backref support into regcomp's ERE parsing was
unintentional.
This commit is contained in:
Rich Felker
2015-03-20 18:25:01 -04:00
parent 39dfd58417
commit 7c8c86f630
1 changed files with 1 additions and 1 deletions
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2
src/regex/regcomp.c
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@ -839,7 +839,7 @@ static reg_errcode_t parse_atom(tre_parse_ctx_t *ctx, const char *s)
s--; s--;
break; break;
default: default:
if (isdigit(*s)) { if (!ere && isdigit(*s)) {
/* back reference */ /* back reference */
int val = *s - '0'; int val = *s - '0';
node = tre_ast_new_literal(ctx->mem, BACKREF, val, ctx->position); node = tre_ast_new_literal(ctx->mem, BACKREF, val, ctx->position);