[es6] Perform the IsConstructor test in GetSuperConstructor.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 6fb66c612d22cf9de47488ae14c96cb0bbdb6d83..18622a60d7ee27a75913f151caff4e16e671f4b8 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1255,6 +1255,10 @@ Type* Typer::Visitor::JSOrdinaryHasInstanceTyper(Type* lhs, Type* rhs,
   return Type::Boolean();
 }
 
+Type* Typer::Visitor::TypeJSGetSuperConstructor(Node* node) {
+  return Type::Receiver();

[Benedikt Meurer, 2016/12/12 18:18:19]

You can say Type::Callable() here which I introduced recently, as this will
always return a constructor, and any constructor is callable (we don't have a
notion of callable in the type system, and I don't think it makes sense now, so
go for callable).

+}
+
 // JS context operators.