From 8733b2ab0c6bfe60df594e41ee9b1ce1f8caeaa0 Mon Sep 17 00:00:00 2001
From: Tim Diekmann <21277928+TimDiekmann@users.noreply.github.com>
Date: Wed, 27 Mar 2019 00:09:12 +0100
Subject: [PATCH] Add `Default` to `std::alloc::System`

---
 src/libstd/alloc.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstd/alloc.rs b/src/libstd/alloc.rs
index a13da2901df94..4241f47b661d7 100644
--- a/src/libstd/alloc.rs
+++ b/src/libstd/alloc.rs
@@ -130,7 +130,7 @@ pub use alloc_crate::alloc::*;
 /// program opts in to using jemalloc as the global allocator, `System` will
 /// still allocate memory using `malloc` and `HeapAlloc`.
 #[stable(feature = "alloc_system_type", since = "1.28.0")]
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, Default, Copy, Clone)]
 pub struct System;
 
 // The Alloc impl just forwards to the GlobalAlloc impl, which is in `std::sys::*::alloc`.