Keep track of script objects in a weak fixed array.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 6e6da98d31e2842f202bd0c74132b77323c065b1..6a78a734f2a37accaa45aee0ee74e3ec3e2428ca 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -3346,6 +3346,8 @@ void Heap::CreateInitialObjects() {
       *WeakHashTable::New(isolate(), 16, USE_DEFAULT_MINIMUM_CAPACITY,
                           TENURED));
 
+  set_script_list(Smi::FromInt(0));
+
   Handle<SeededNumberDictionary> slow_element_dictionary =
       SeededNumberDictionary::New(isolate(), 0, TENURED);
   slow_element_dictionary->set_requires_slow_elements();
@@ -3414,6 +3416,7 @@ bool Heap::RootCanBeWrittenAfterInitialization(Heap::RootListIndex root_index) {
     case kPolymorphicCodeCacheRootIndex:
     case kEmptyScriptRootIndex:
     case kSymbolRegistryRootIndex:
+    case kScriptListRootIndex:
     case kMaterializedObjectsRootIndex:
     case kAllocationSitesScratchpadRootIndex:
     case kMicrotaskQueueRootIndex: