Auto merge of #60104 - Centril:rollup-7vmae1a, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #59915 (Implement event filtering for self-profiler.)
 - #59933 (Make clear that format padding doesn't work for Debug)
 - #60023 (implement specialized nth_back() for Bytes, Fuse and Enumerate)
 - #60032 (Remove unwanted z-index change)
 - #60041 (Simplify the returning of a Result a bit)
 - #60045 (Suggest appropriate path when calling associated item on bare types)
 - #60052 (Correct unused parameter diagnostic)
 - #60056 (Update rustfmt to 1.2.1)
 - #60060 (whitelist RTM x86 target cpu feature)
 - #60061 (Change suggestion of field when not in self context)
 - #60064 (Point at try `?` on errors affecting the err match arm of the desugared code)
 - #60078 (Use more realistic example for thread builder)
 - #60080 (Fix small errors in docs for `rchunks_exact` and `rchunks_exact_mut`.)
 - #60082 (Update miri)
 - #60097 (Use -mergefunc-use-aliases for any LLVM >= 8)
 - #60098 (libcore: deny `elided_lifetimes_in_paths`)

Failed merges:

r? @ghost

2 files changed, 2 insertions, 3 deletions

diff --git a/src/libstd/fs.rs b/src/libstd/fs.rs
index dea198d8c91..1772879d013 100644
--- a/src/libstd/fs.rs
+++ b/src/libstd/fs.rs
@@ -901,8 +901,7 @@ impl OpenOptions {
     }
 
     fn _open(&self, path: &Path) -> io::Result<File> {
-        let inner = fs_imp::File::open(path, &self.0)?;
-        Ok(File { inner })
+        fs_imp::File::open(path, &self.0).map(|inner| File { inner })
     }
 }
 
diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index c59226e0c0b..fce28ffd9c3 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -269,7 +269,7 @@ impl Builder {
     ///
     /// let builder = thread::Builder::new()
     ///                               .name("foo".into())
-    ///                               .stack_size(10);
+    ///                               .stack_size(32 * 1024);
     ///
     /// let handler = builder.spawn(|| {
     ///     // thread code