Add one more stop

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index 42a4a8178cfa66c3f1789dc5d5f1c7cd9af482ee..6bcaeb6895c083d9e7709d144808fbd9e17faa3a 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -1386,6 +1386,11 @@ void Isolate::Run() {
 
 
 void Isolate::AddClosureFunction(const Function& function) const {
+  // TODO(regis): remove once debugging complete.
+  if (Compiler::IsBackgroundCompilation()) {
+    Profiler::DumpStackTrace(true /*native*/);

[regis, 2016/04/28 17:53:35]

Maybe you could also print the dart stack. The call _printCurrentStacktrace()
always works for me in the debugger.

[srdjan, 2016/04/28 18:16:18]

There is no Dart stack in the background compilation thread.

[regis, 2016/04/28 18:37:13]

Duh, never mind :-)

+    UNREACHABLE();
+  }
   ASSERT(!Compiler::IsBackgroundCompilation());
   GrowableObjectArray& closures =
       GrowableObjectArray::Handle(object_store()->closure_functions());