[libc++][format] Fix a missing include in <format> tests. (llvm#71252)

var-const · web-flow · commit aa9f14a52d33 · 2023-11-05T08:32:51.000-05:00
diff --git a/libcxx/test/support/format.functions.common.h b/libcxx/test/support/format.functions.common.h
@@ -12,8 +12,9 @@
 
 #include <algorithm>
 #include <cctype>
-#include <cstddef>
 #include <charconv>
+#include <cstddef>
+#include <cstdlib>
 #include <format>
 #include <ranges>
 #include <string>
