re.c: fix name with NUL

* re.c (match_aref): should not ignore name after NUL byte.
  [ruby-dev:48275] [Bug #9902]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46344 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 7 deletions

diff --git a/re.c b/re.c
index 89910f67b4..dff95b7942 100644
--- a/re.c
+++ b/re.c
@@ -1796,17 +1796,13 @@ match_aref(int argc, VALUE *argv, VALUE match)
 
 	    switch (TYPE(idx)) {
 	      case T_SYMBOL:
-		p = rb_id2name(SYM2ID(idx));
-		goto name_to_backref;
-		break;
+		idx = rb_sym2str(idx);
+		/* fall through */
 	      case T_STRING:
 		p = StringValuePtr(idx);
-
-	      name_to_backref:
 		num = name_to_backref_number(RMATCH_REGS(match),
-					     RMATCH(match)->regexp, p, p + strlen(p));
+					     RMATCH(match)->regexp, p, p + RSTRING_LEN(idx));
 		return rb_reg_nth_match(num, match);
-		break;
 
 	      default:
 		break;