VM: Another fix for precompiling with >1 iterations.

runtime/vm/object_store.cc

Index: runtime/vm/object_store.cc
diff --git a/runtime/vm/object_store.cc b/runtime/vm/object_store.cc
index 95810d22465531addae920839b5da07f2e6f8a9c..1200556416215b5e1e4769bab12e4d48537995a9 100644
--- a/runtime/vm/object_store.cc
+++ b/runtime/vm/object_store.cc
@@ -184,6 +184,10 @@ RawError* ObjectStore::PreallocateObjects() {
 
 
 void ObjectStore::InitKnownObjects() {
+#ifdef DART_PRECOMPILED_RUNTIME
+  // These objects are only needed for code generation.
+  return;
+#else
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
@@ -205,6 +209,7 @@ void ObjectStore::InitKnownObjects() {
   const Library& internal_lib = Library::Handle(internal_library());
   cls = internal_lib.LookupClass(Symbols::Symbol());
   set_symbol_class(cls);
+#endif
 }
 
 }  // namespace dart