DO NOT COMMIT: Check there's no scheduled exceptions in Call

src/execution.cc

Index: src/execution.cc
diff --git a/src/execution.cc b/src/execution.cc
index c8ddfafa5fa75479f022028b7485bf5f2d5ff12b..85a16ac7d7d50c3b09a569c8d379653148dc539e 100644
--- a/src/execution.cc
+++ b/src/execution.cc
@@ -140,6 +140,7 @@ MUST_USE_RESULT MaybeHandle<Object> Invoke(Isolate* isolate, bool is_construct,
 MaybeHandle<Object> Execution::Call(Isolate* isolate, Handle<Object> callable,
                                     Handle<Object> receiver, int argc,
                                     Handle<Object> argv[]) {
+  CHECK(!isolate->has_scheduled_exception());
   // Convert calls on global objects to be calls on the global
   // receiver instead to avoid having a 'this' pointer which refers
   // directly to a global object.