* string.c (rb_str_copy_to_vm): reset instance variables.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/mvm@25869 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index b9b4852e50..ddb9ac6055 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Nov 20 08:14:53 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* string.c (rb_str_copy_to_vm): reset instance variables.
+
 Fri Nov 20 04:39:40 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm.c (rb_vm_send, rb_vm_recv): supported strings.
diff --git a/string.c b/string.c
index 52c40dd6d0..35d3c0d540 100644
--- a/string.c
+++ b/string.c
@@ -7550,6 +7550,8 @@ rb_str_copy_to_vm(VALUE str, struct rb_objspace *objspace)
 {
     VALUE copy = rb_newobj_from_heap(objspace);
     *RSTRING(copy) = *RSTRING(str);
+    RBASIC(copy)->flags &= ~FL_FINALIZE|FL_EXIVAR;
+    RBASIC(copy)->flags |= FL_FREEZE;
     if (!STR_EMBED_P(copy)) {
 	const long size = RSTRING(copy)->as.heap.len;
 	char *const ptr = rb_objspace_xmalloc(objspace, size);