From 7c8c86f6308c7e0816b9638465a5917b12159e8f Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Fri, 20 Mar 2015 18:25:01 -0400 Subject: [PATCH] suppress backref processing in ERE regcomp 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. --- src/regex/regcomp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c index bce6bc15..4d80cb1c 100644 --- a/src/regex/regcomp.c +++ b/src/regex/regcomp.c @@ -839,7 +839,7 @@ static reg_errcode_t parse_atom(tre_parse_ctx_t *ctx, const char *s) s--; break; default: - if (isdigit(*s)) { + if (!ere && isdigit(*s)) { /* back reference */ int val = *s - '0'; node = tre_ast_new_literal(ctx->mem, BACKREF, val, ctx->position); -- 2.25.1