resurrect the string to expect modifications

String#freeze can be redefined to be destructive.  While such
redefinition is definitely weird, it should be possible.  Resurrect
the string to prepare for that sort of things.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64691 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

insns.def

@@ -760,7 +760,7 @@ opt_str_freeze
     val = vm_opt_str_freeze(str, BOP_FREEZE, idFreeze);
 
     if (val == Qundef) {
-        PUSH(str);
+        PUSH(rb_str_resurrect(str));
 #ifndef MJIT_HEADER
         ADD_PC(-WIDTH_OF_opt_send_without_block);
 #endif
@@ -777,7 +777,7 @@ opt_str_uminus
     val = vm_opt_str_freeze(str, BOP_UMINUS, idUMinus);
 
     if (val == Qundef) {
-        PUSH(str);
+        PUSH(rb_str_resurrect(str));
 #ifndef MJIT_HEADER
         ADD_PC(-WIDTH_OF_opt_send_without_block);
 #endif