Changing the alloc() to accept &self instead of &mut self

1 files changed, 2 insertions, 2 deletions

diff --git a/library/std/src/alloc.rs b/library/std/src/alloc.rs
index 770c97899f0..86ae4cf4dd2 100644
--- a/library/std/src/alloc.rs
+++ b/library/std/src/alloc.rs
@@ -133,7 +133,7 @@ pub struct System;
 
 impl System {
     #[inline]
-    fn alloc_impl(&mut self, layout: Layout, zeroed: bool) -> Result<NonNull<[u8]>, AllocErr> {
+    fn alloc_impl(&self, layout: Layout, zeroed: bool) -> Result<NonNull<[u8]>, AllocErr> {
         match layout.size() {
             0 => Ok(NonNull::slice_from_raw_parts(layout.dangling(), 0)),
             // SAFETY: `layout` is non-zero in size,
@@ -202,7 +202,7 @@ impl System {
 #[unstable(feature = "allocator_api", issue = "32838")]
 unsafe impl AllocRef for System {
     #[inline]
-    fn alloc(&mut self, layout: Layout) -> Result<NonNull<[u8]>, AllocErr> {
+    fn alloc(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocErr> {
         self.alloc_impl(layout, false)
     }