[libc++] NFC: Remove warning about non-void function returning void

diff --git a/libcxx/test/libcxx/utilities/any/allocator.pass.cpp b/libcxx/test/libcxx/utilities/any/allocator.pass.cpp
index 9de8c5e..7891db6 100644 (file)
--- a/libcxx/test/libcxx/utilities/any/allocator.pass.cpp
+++ b/libcxx/test/libcxx/utilities/any/allocator.pass.cpp
@@ -77,7 +77,7 @@ namespace std {
     using propagate_on_container_move_assignment = std::true_type;
     using is_always_equal = std::true_type;
 
-    Small* allocate(std::size_t) { assert(false); }
+    Small* allocate(std::size_t) { assert(false); return nullptr; }
 
     template <typename ...Args>
     void construct(Small* p, Args&& ...args) {