fixes for latest nightly

stage_3/protected32.json

@@ -5,7 +5,7 @@
   "data-layout": "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-i128:128-f64:32:64-f80:32-n8:16:32-S128",
   "target-endian": "little",
   "target-pointer-width": "32",
-  "target-c-int-width": "32",
+  "target-c-int-width": 32,
   "executables": true,
   "linker-flavor": "ld.lld",
   "linker": "rust-lld",

stage_3/src/spin.rs

@@ -13,7 +13,7 @@ impl<T> Spinlock<T> {
     }
   }
 
-  pub fn lock(&self) -> SpinlockGuard<T> {
+  pub fn lock(&self) -> SpinlockGuard<'_, T> {
     // If we observe `locked` was `false`, then:
     // - Use acquire ordering, so nothing inside the critical section gets reordered before we
     //   observed the `false` value.