From aa5676b1f2dc946bc359c1fd4081165814027caa Mon Sep 17 00:00:00 2001
From: Dzmitry Malyshau <kvarkus@gmail.com>
Date: Sat, 11 Jul 2020 10:30:26 -0400
Subject: [PATCH] Fix hub insertion

---
 wgpu-core/src/hub.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wgpu-core/src/hub.rs b/wgpu-core/src/hub.rs
index 47ca13d6de..293db6bc97 100644
--- a/wgpu-core/src/hub.rs
+++ b/wgpu-core/src/hub.rs
@@ -138,8 +138,8 @@ impl<T, I: TypedId> Storage<T, I> {
 
     pub fn insert(&mut self, id: I, value: T) {
         let (index, epoch, _) = id.unzip();
-        if let Some(diff) = (index as usize).checked_sub(self.map.len()) {
-            self.map.resize_with(diff + 1, || Element::Vacant);
+        if index as usize >= self.map.len() {
+            self.map.resize_with(index as usize + 1, || Element::Vacant);
         }
         match std::mem::replace(
             &mut self.map[index as usize],