Index: include/llvm/ADT/iterator_range.h
===================================================================
--- include/llvm/ADT/iterator_range.h
+++ include/llvm/ADT/iterator_range.h
@@ -60,8 +60,9 @@
 }
 
 template<typename T>
-iterator_range<decltype(begin(std::declval<T>()))> drop_begin(T &&t, int n) {
-  return make_range(std::next(begin(t), n), end(t));
+iterator_range<decltype(std::begin(std::declval<T>()))>
+drop_begin(T &&t, int n) {
+  return make_range(std::next(std::begin(t), n), std::end(t));
 }
 }