Check tuple types when getting the type node's type.

src/compiler/checker.ts

@@ -5027,6 +5027,7 @@ namespace ts {
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
+                checkTupleType(node);
                 links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode));
             }
             return links.resolvedType;