Github Add Box::downcast() for dyn Any + Send + Sync by sdroege · Pull Request #...

The job mingw-check failed! Check out the build log: (web) (plain)

configure: rust.channel         := nightly
configure: rust.debug-assertions := True
configure: llvm.assertions      := True
configure: dist.missing-tools   := True
configure: build.configure-args := ['--enable-sccache', '--disable-manage-submodu ...
configure: writing `config.toml` in current directory
configure: 
configure: run `python /checkout/x.py --help`
configure: 
---
skip untracked path cpu-usage.csv during rustfmt invocations
skip untracked path src/doc/book/ during rustfmt invocations
skip untracked path src/doc/rust-by-example/ during rustfmt invocations
skip untracked path src/llvm-project/ during rustfmt invocations
Diff in /checkout/library/alloc/src/boxed.rs at line 1387:
     pub fn downcast<T: Any>(self) -> Result<Box<T, A>, Self> {
         if self.is::<T>() {
             unsafe {
-                let (raw, alloc): (*mut (dyn Any + Send + Sync), _) = Box::into_raw_with_allocator(self);
+                let (raw, alloc): (*mut (dyn Any + Send + Sync), _) =
+                    Box::into_raw_with_allocator(self);
                 Ok(Box::from_raw_in(raw as *mut T, alloc))
         } else {
         } else {
Running `"/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/rustfmt" "--config-path" "/checkout" "--edition" "2018" "--unstable-features" "--skip-children" "--check" "/checkout/library/alloc/src/boxed.rs"` failed.
If you're running `tidy`, try again with `--bless`. Or, if you just want to format code, run `./x.py fmt` instead.
Build completed unsuccessfully in 0:00:21