From 61f0a2b3fd961c9ae6d327d384bcffabf89a1c26 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Wed, 29 Aug 2018 23:08:47 +0200
Subject: fix some uses of pointer intrinsics with invalid pointers

---
 src/libstd/collections/hash/table.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src/libstd')

diff --git a/src/libstd/collections/hash/table.rs b/src/libstd/collections/hash/table.rs
index 768357ec8dc..547f97cc8ac 100644
--- a/src/libstd/collections/hash/table.rs
+++ b/src/libstd/collections/hash/table.rs
@@ -742,7 +742,9 @@ impl<K, V> RawTable<K, V> {
     ) -> Result<RawTable<K, V>, CollectionAllocErr> {
         unsafe {
             let ret = RawTable::new_uninitialized_internal(capacity, fallibility)?;
-            ptr::write_bytes(ret.hashes.ptr(), 0, capacity);
+            if capacity > 0 {
+                ptr::write_bytes(ret.hashes.ptr(), 0, capacity);
+            }
             Ok(ret)
         }
     }
-- 
cgit 1.4.1-3-g733a5