A couple of other "stack overflow" vs. "has_pending_exception()" issues fixed.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index feda52a61086dde3d6d2f90e12005847cb34e9c3..c46df53851a5fef9e39d1b02c829d8d7073a4308 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1018,6 +1018,10 @@ void Shell::InitializeDebugger(Isolate* isolate) {
   Handle<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
   utility_context_.Reset(isolate,
                          Context::New(isolate, NULL, global_template));
+  if (utility_context_.IsEmpty()) {
+    printf("Failed to initialize debugger\n");
+    Shell::Exit(1);
+  }
 #endif  // !V8_SHARED
 }