Print message when LocalHeap::IsHandleDereferenceAllowed fails

Change-Id: I0aede0a2a188fc17492c10c0c13568c052282548
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2534822
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71170}

src/handles/handles.cc

@@ -45,8 +45,11 @@ bool HandleBase::IsDereferenceAllowed() const {
 
   LocalHeap* local_heap = LocalHeap::Current();
   if (FLAG_local_heaps && local_heap) {
-    // Local heap can't access handles when parked
-    if (!local_heap->IsHandleDereferenceAllowed()) return false;
+    if (!local_heap->IsHandleDereferenceAllowed()) {
+      StdoutStream{} << "Cannot dereference handle owned by "
+                     << "non-running local heap\n";
+      return false;
+    }
 
     if (local_heap->ContainsPersistentHandle(location_) ||
         local_heap->ContainsLocalHandle(location_)) {