Auto merge of #52735 - Mark-Simulacrum:rollup, r=Mark-Simulacrum

Rollup of 16 pull requests

Successful merges:

 - #52558 (Add tests for ICEs which no longer repro)
 - #52610 (Clarify what a task is)
 - #52617 (Don't match on region kinds when reporting NLL errors)
 - #52635 (Fix #[linkage] propagation though generic functions)
 - #52647 (Suggest to take and ignore args while closure args count mismatching)
 - #52649 (Point spans to inner elements of format strings)
 - #52654 (Format linker args in a way that works for gcc and ld)
 - #52667 (update the stdsimd submodule)
 - #52674 (Impl Executor for Box<E: Executor>)
 - #52690 (ARM: expose `rclass` and `dsp` target features)
 - #52692 (Improve readability in a few sorts)
 - #52695 (Hide some lints which are not quite right the way they are reported to the user)
 - #52718 (State default capacity for BufReader/BufWriter)
 - #52721 (std::ops::Try impl for std::task::Poll)
 - #52723 (rustc: Register crates under their real names)
 - #52734 (sparc ABI issue - structure returning from function is returned in 64bit registers (with tests))

Failed merges:

 - #52678 ([NLL] Use better spans in some errors)

r? @ghost

1 files changed, 14 insertions, 1 deletions

diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs
index 6d3bc6e79b5..2cf9b13a67a 100644
--- a/src/liballoc/boxed.rs
+++ b/src/liballoc/boxed.rs
@@ -67,7 +67,7 @@ use core::marker::{Unpin, Unsize};
 use core::mem::{self, PinMut};
 use core::ops::{CoerceUnsized, Deref, DerefMut, Generator, GeneratorState};
 use core::ptr::{self, NonNull, Unique};
-use core::task::{Context, Poll};
+use core::task::{Context, Poll, Executor, SpawnErrorKind, SpawnObjError};
 
 use raw_vec::RawVec;
 use str::from_boxed_utf8_unchecked;
@@ -973,6 +973,19 @@ unsafe impl<'a, T, F> UnsafeFutureObj<'a, T> for PinBox<F>
 }
 
 #[unstable(feature = "futures_api", issue = "50547")]
+impl<E> Executor for Box<E>
+    where E: Executor + ?Sized
+{
+    fn spawn_obj(&mut self, task: FutureObj<'static, ()>) -> Result<(), SpawnObjError> {
+        (**self).spawn_obj(task)
+    }
+
+    fn status(&self) -> Result<(), SpawnErrorKind> {
+        (**self).status()
+    }
+}
+
+#[unstable(feature = "futures_api", issue = "50547")]
 impl<'a, F: Future<Output = ()> + Send + 'a> From<PinBox<F>> for FutureObj<'a, ()> {
     fn from(boxed: PinBox<F>) -> Self {
         FutureObj::new(boxed)