The Global Load IC doesn't yet play well with --vector-ics.

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 4a0e6c8102820eb035bdf2262e1c1d1e73b2353f..651eb2cac61ac24f93d232e1ecded9c892383bf6 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -951,6 +951,9 @@ Handle<Code> LoadIC::initialize_stub(Isolate* isolate,
 
 Handle<Code> LoadIC::load_global(Isolate* isolate, Handle<GlobalObject> global,
                                  Handle<String> name) {
+  // This special IC doesn't work with vector ics.
+  DCHECK(!FLAG_vector_ics);
+
   Handle<ScriptContextTable> script_contexts(
       global->native_context()->script_context_table());