Detect circular dependencies in compile time constants

runtime/vm/object_store.cc

Index: runtime/vm/object_store.cc
===================================================================
--- runtime/vm/object_store.cc	(revision 26486)
+++ runtime/vm/object_store.cc	(working copy)
@@ -63,6 +63,7 @@
     utf_library_(Library::null()),
     libraries_(GrowableObjectArray::null()),
     pending_classes_(GrowableObjectArray::null()),
+    pending_functions_(GrowableObjectArray::null()),
     sticky_error_(Error::null()),
     unhandled_exception_handler_(String::null()),
     empty_context_(Context::null()),
@@ -105,6 +106,9 @@
   ASSERT(this->out_of_memory() == Instance::null());
   ASSERT(this->preallocated_stack_trace() == Stacktrace::null());
 
+  ASSERT(this->pending_functions() == GrowableObjectArray::null());
+  this->pending_functions_ = GrowableObjectArray::New();
+
   Object& result = Object::Handle();
   const Library& library = Library::Handle(Library::CoreLibrary());