(early draft) Strict mode - throw exception on assignment to read only property.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index b3c52f1f1ff8289d26c4c451111aa12d080f473d..f450a345971ad4d31204be2e5cb5dfb012f9bce0 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -10091,10 +10091,11 @@ class RegExpStringModificationTest {
     // Inject the input as a global variable.
     i::Handle<i::String> input_name =
         i::Factory::NewStringFromAscii(i::Vector<const char>("input", 5));
-    i::Top::global_context()->global()->SetProperty(*input_name,
-                                                    *input_,
-                                                    NONE)->ToObjectChecked();
-
+    i::Top::global_context()->global()->SetProperty(
+        *input_name,
+        *input_,
+        NONE,
+        i::kNonStrictMode)->ToObjectChecked();
 
     MorphThread morph_thread(this);
     morph_thread.Start();