From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 13 Apr 2012 23:50:58 +0000 (-0400)
Subject: remove invalid code from TRE
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=386b34a07bc65b6b0627d04105f60fb5fa79df33

remove invalid code from TRE

TRE wants to treat + and ? after a +, ?, or * as special; ? means
ungreedy and + is reserved for future use. however, this is
non-conformant. although redundant, these redundant characters have
well-defined (no-op) meaning for POSIX ERE, and are actually _literal_
characters (which TRE is wrongly ignoring) in POSIX BRE mode.

the simplest fix is to simply remove the unneeded nonstandard
functionality. as a plus, this shaves off a small amount of bloat.
---

diff --git a/src/regex/regcomp.c b/src/regex/regcomp.c
index 8987f5aa..f8ebe409 100644
--- a/src/regex/regcomp.c
+++ b/src/regex/regcomp.c
@@ -1105,20 +1105,6 @@ tre_parse(tre_parse_ctx_t *ctx)
 		if (*ctx->re == CHAR_QUESTIONMARK)
 		  rep_max = 1;
 
-		  {
-		    if (*(ctx->re + 1) == CHAR_QUESTIONMARK)
-		      {
-			minimal = 1;
-			ctx->re++;
-		      }
-		    else if (*(ctx->re + 1) == CHAR_STAR
-			     || *(ctx->re + 1) == CHAR_PLUS)
-		      {
-			/* These are reserved for future extensions. */
-			return REG_BADRPT;
-		      }
-		  }
-
 		ctx->re++;
 		tmp_node = tre_ast_new_iter(ctx->mem, result, rep_min, rep_max,
 					    minimal);