Fix clippy warnings

Fixes clippy::{cone_on_copy, filter_next, redundant_closure, single_char_pattern, len_zero,redundant_field_names, useless_format, identity_conversion, map_clone, into_iter_on_ref, needless_return, option_as_ref_deref, unused_unit, unnecessary_mut_passed}

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
index 7a3cbbe4562..738f07250b5 100644
--- a/src/libstd/thread/mod.rs
+++ b/src/libstd/thread/mod.rs
@@ -1272,7 +1272,7 @@ impl Thread {
     }
 
     fn cname(&self) -> Option<&CStr> {
-        self.inner.name.as_ref().map(|s| &**s)
+        self.inner.name.as_deref()
     }
 }