Auto merge of #74330 - Manishearth:rollup-mrc09pb, r=Manishearth

Rollup of 15 pull requests

Successful merges:

 - #71237 (Add Ayu theme to rustdoc)
 - #73720 (Clean up E0704 error explanation)
 - #73866 (Obviate #[allow(improper_ctypes_definitions)])
 - #73965 (typeck: check for infer before type impls trait)
 - #73986 (add (unchecked) indexing methods to raw (and NonNull) slices)
 - #74173 (Detect tuple struct incorrectly used as struct pat)
 - #74220 (Refactor Windows `parse_prefix`)
 - #74227 (Remove an unwrap in layout computation)
 - #74239 (Update llvm-project to latest origin/rustc/10.0-2020-05-05 commit )
 - #74257 (don't mark linux kernel module targets as a unix environment)
 - #74270 (typeck: report placeholder type error w/out span)
 - #74296 (Clarify the description for rfind)
 - #74310 (Use `ArrayVec` in `SparseBitSet`.)
 - #74316 (Remove unnecessary type hints from Wake internals)
 - #74324 (Update Clippy)

Failed merges:

r? @ghost

1 files changed, 2 insertions, 3 deletions

diff --git a/src/liballoc/task.rs b/src/liballoc/task.rs
index 0d1cc99df47..252e04a4105 100644
--- a/src/liballoc/task.rs
+++ b/src/liballoc/task.rs
@@ -69,14 +69,13 @@ fn raw_waker<W: Wake + Send + Sync + 'static>(waker: Arc<W>) -> RawWaker {
 
     // Wake by value, moving the Arc into the Wake::wake function
     unsafe fn wake<W: Wake + Send + Sync + 'static>(waker: *const ()) {
-        let waker: Arc<W> = unsafe { Arc::from_raw(waker as *const W) };
+        let waker = unsafe { Arc::from_raw(waker as *const W) };
         <W as Wake>::wake(waker);
     }
 
     // Wake by reference, wrap the waker in ManuallyDrop to avoid dropping it
     unsafe fn wake_by_ref<W: Wake + Send + Sync + 'static>(waker: *const ()) {
-        let waker: ManuallyDrop<Arc<W>> =
-            unsafe { ManuallyDrop::new(Arc::from_raw(waker as *const W)) };
+        let waker = unsafe { ManuallyDrop::new(Arc::from_raw(waker as *const W)) };
         <W as Wake>::wake_by_ref(&waker);
     }