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authorRich Felker <dalias@aerifal.cx>2015-03-20 18:25:01 -0400
committerRich Felker <dalias@aerifal.cx>2015-03-20 18:28:37 -0400
commit7c8c86f6308c7e0816b9638465a5917b12159e8f (patch)
tree1ed8044a0a76be0bd66ecf93e055e524c1ba0fd8 /src
parent39dfd58417ef642307d90306e1c7e50aaec5a35c (diff)
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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.
Diffstat (limited to 'src')
-rw-r--r--src/regex/regcomp.c2
1 files changed, 1 insertions, 1 deletions
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);