Fix not checking if an Array is not extensible in the native setter f…

…unction Fixes #33 Signed-off-by: Daniel Balla [email protected]
Samsung · Jan 2, 2019 · 16c8269 · 16c8269
1 parent 8f6925a
commit 16c8269
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/runtime/VMInstance.cpp b/src/runtime/VMInstance.cpp
@@ -73,7 +73,7 @@ bool VMInstance::arrayLengthNativeSetter(ExecutionState& state, Object* self, Sm
     }
 
     bool ret;
-    if (UNLIKELY(!isPrimitiveValue && !self->structure()->readProperty(state, (size_t)0).m_descriptor.isWritable())) {
+    if (UNLIKELY(!self->isExtensible() || (!isPrimitiveValue && !self->structure()->readProperty(state, (size_t)0).m_descriptor.isWritable()))) {
         ret = false;
     } else {
         ret = self->asArrayObject()->setArrayLength(state, newLen);