List class was not initialized properly (it has type parameters). Do not preinitialize it incorrect…

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
===================================================================
--- runtime/vm/flow_graph_compiler.cc	(revision 24887)
+++ runtime/vm/flow_graph_compiler.cc	(working copy)
@@ -87,9 +87,13 @@
           Isolate::Current()->object_store()->float32x4_class())),
       uint32x4_class_(Class::ZoneHandle(
           Isolate::Current()->object_store()->uint32x4_class())),
+      list_class_(Class::ZoneHandle(
+          Library::Handle(Library::CoreLibrary()).
+              LookupClass(Symbols::List()))),
       parallel_move_resolver_(this),
       pending_deoptimization_env_(NULL) {
   ASSERT(assembler != NULL);
+  ASSERT(!list_class_.IsNull());
 }