merges r22255 from trunk into ruby_1_9_1.

* compile.c (compile_array_, defined_expr, iseq_compile_each): hide
  and freeze internal literal objects, to prevent from modifying.
  [ruby-dev:37959]

* iseq.c (insn_operand_intern): copy internal literal objects.

* insns.def (putstring, duparray): ditto.

* string.c (rb_str_replace): exported.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@22532 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/iseq.c b/iseq.c
index 68a8d7c46..146d52e30 100644
--- a/iseq.c
+++ b/iseq.c
@@ -21,6 +21,8 @@
 
 VALUE rb_cISeq;
 
+#define hidden_obj_p(obj) (!SPECIAL_CONST_P(obj) && !RBASIC(obj)->klass)
+
 static void
 compile_data_free(struct iseq_compile_data *compile_data)
 {
@@ -699,6 +701,16 @@ insn_operand_intern(rb_iseq_t *iseq,
 	op = ID2SYM(op);
 
       case TS_VALUE:		/* VALUE */
+	if (hidden_obj_p(op)) {
+	    switch (BUILTIN_TYPE(op)) {
+	      case T_STRING:
+		op = rb_str_replace(rb_str_new(0, 0), op);
+		break;
+	      case T_ARRAY:
+		op = rb_ary_replace(rb_ary_new2(0), op);
+		break;
+	    }
+	}
 	ret = rb_inspect(op);
 	if (CLASS_OF(op) == rb_cISeq) {
 	    rb_ary_push(child, op);