From: Nicholas Nethercote <nnethercote@mozilla.com>
Date: Thu, 21 May 2020 00:36:32 +0000 (+1000)
Subject: [PATCH] Fix off-by-one error in `DroplessArena::alloc_raw`.
X-Git-Tag: archive/raspbian/1.45.0+dfsg1-2+rpi1^2~23
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=988f4b013b44c33fce9225e6e4fd5fa00c1fa48e;p=rustc.git

[PATCH] Fix off-by-one error in `DroplessArena::alloc_raw`.

This causes unnecessary calls to `grow` when the allocation would fit
exactly in the remaining space.

Gbp-Pq: Name u-5ceff6b96af9a21e044545b9e064433feccaf659.patch
---

diff --git a/src/libarena/lib.rs b/src/libarena/lib.rs
index bbe80c26dc..725850036b 100644
--- a/src/libarena/lib.rs
+++ b/src/libarena/lib.rs
@@ -386,7 +386,7 @@ impl DroplessArena {
             self.align(align);
 
             let future_end = intrinsics::arith_offset(self.ptr.get(), bytes as isize);
-            if (future_end as *mut u8) >= self.end.get() {
+            if (future_end as *mut u8) > self.end.get() {
                 self.grow(bytes);
             }