--- old/src/share/vm/opto/narrowptrnode.cpp	2017-09-21 09:18:02.584998260 +0200
+++ new/src/share/vm/opto/narrowptrnode.cpp	2017-09-21 09:18:02.496998261 +0200
@@ -42,7 +42,7 @@
   if (t == Type::TOP) return Type::TOP;
   if (t == TypeNarrowOop::NULL_PTR) return TypePtr::NULL_PTR;
 
-  assert(t->isa_narrowoop(), "only  narrowoop here");
+  assert(t->isa_narrowoop(), "only narrowoop here");
   return t->make_ptr();
 }