* string.c (rb_str_sub_bang): calling rb_str_modify() should be just

  before actually modifying the string.
  fixed: [ruby-dev:30211] (originally reported by zunda)


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@11597 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 7 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index ba931add63..e356c15b5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Jan 30 14:58:51 2007  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* string.c (rb_str_sub_bang): calling rb_str_modify() should be just
+	  before actually modifying the string.
+	  fixed: [ruby-dev:30211] (originally reported by zunda)
+
 Tue Jan 30 12:05:35 2007  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* mkconfig.rb: autoconf 2.61 support.  [ruby-core:10016]
diff --git a/string.c b/string.c
index 3261db61ed..08c958d8e4 100644
--- a/string.c
+++ b/string.c
@@ -1966,7 +1966,6 @@ rb_str_sub_bang(argc, argv, str)
 
     pat = get_pat(argv[0], 1);
     if (rb_reg_search(pat, str, 0, 0) >= 0) {
-	rb_str_modify(str);
 	match = rb_backref_get();
 	regs = RMATCH(match)->regs;
 
@@ -1982,6 +1981,7 @@ rb_str_sub_bang(argc, argv, str)
 	else {
 	    repl = rb_reg_regsub(repl, str, regs);
 	}
+	rb_str_modify(str);
 	if (OBJ_TAINTED(repl)) tainted = 1;
 	plen = END(0) - BEG(0);
 	if (RSTRING(repl)->len > plen) {