Check whether the marking deque overflowed in ProcessEphemeralMarking

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 27d257980f281c9067d264f8e239bda5d198a481..b2f067bc9049961d337c832437201c35cdf576d3 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -2241,6 +2241,7 @@ void MarkCompactCollector::MarkLiveObjects() {
         &IsUnmarkedHeapObject);
     // Then we mark the objects.
     heap()->isolate()->global_handles()->IterateWeakRoots(&root_visitor);
+    ProcessMarkingDeque();
 
     // Repeat Harmony weak maps marking to mark unmarked objects reachable from
     // the weak roots we just marked as pending destruction.