From 0115eb8dd887649ab605f8bad559372df21b5ad1 Mon Sep 17 00:00:00 2001
From: 12101111 <w12101111@gmail.com>
Date: Sat, 9 Oct 2021 00:01:04 +0800
Subject: [PATCH] Fix UB in hashglobe

---
 components/hashglobe/src/table.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/hashglobe/src/table.rs b/components/hashglobe/src/table.rs
index 0fe08f2b052..e418c11b04d 100644
--- a/components/hashglobe/src/table.rs
+++ b/components/hashglobe/src/table.rs
@@ -836,7 +836,9 @@ impl<K, V> RawTable<K, V> {
     pub fn new(capacity: usize) -> Result<RawTable<K, V>, FailedAllocationError> {
         unsafe {
             let ret = RawTable::try_new_uninitialized(capacity)?;
-            ptr::write_bytes(ret.hashes.ptr(), 0, capacity);
+            if capacity > 0 {
+                ptr::write_bytes(ret.hashes.ptr(), 0, capacity);
+            }
             Ok(ret)
         }
     }