From: Szabolcs Nagy <nsz@port70.net>
Date: Mon, 29 Feb 2016 15:04:46 +0000 (+0000)
Subject: fix * at the start of a BRE subexpression
X-Git-Tag: v1.1.15~96
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=39ea71fb8afddda879a1999f2a203dfdaf57a639;p=musl

fix * at the start of a BRE subexpression

commit 7eaa76fc2e7993582989d3838b1ac32dd8abac09 made * invalid at
the start of a BRE subexpression, but it should be accepted as
literal * there according to the standard.

This patch does not fix subexpressions starting with ^*.
---

diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c
index da6abd18..7a2864cd 100644
--- a/src/regex/regcomp.c
+++ b/src/regex/regcomp.c
@@ -889,7 +889,6 @@ static reg_errcode_t parse_atom(tre_parse_ctx_t *ctx, const char *s)
 		s++;
 		break;
 	case '*':
-		return REG_BADPAT;
 	case '{':
 	case '+':
 	case '?':
@@ -978,9 +977,6 @@ static reg_errcode_t tre_parse(tre_parse_ctx_t *ctx)
 		}
 
 	parse_iter:
-		/* extension: repetitions are rejected after an empty node
-		   eg. (+), |*, {2}, but assertions are not treated as empty
-		   so ^* or $? are accepted currently. */
 		for (;;) {
 			int min, max;