Do not notify debugger on stack overflow

runtime/vm/exceptions.cc

Index: runtime/vm/exceptions.cc
===================================================================
--- runtime/vm/exceptions.cc	(revision 38068)
+++ runtime/vm/exceptions.cc	(working copy)
@@ -585,7 +585,13 @@
 
 
 void Exceptions::Throw(Isolate* isolate, const Instance& exception) {
-  isolate->debugger()->SignalExceptionThrown(exception);
+  // Do not notify debugger on stack overflow and out of memory exceptions.
+  // The VM would crash when the debugger calls back into the VM to
+  // get values of variables.
+  if (exception.raw() != isolate->object_store()->out_of_memory() &&
+      exception.raw() != isolate->object_store()->stack_overflow()) {
+    isolate->debugger()->SignalExceptionThrown(exception);
+  }
   // Null object is a valid exception object.
   ThrowExceptionHelper(isolate, exception, Instance::Handle(isolate), false);
 }