Auto merge of #52802 - kennytm:rollup, r=kennytm

Rollup of 11 pull requests

Successful merges:

 - #52702 (Suggest fix when encountering different mutability from impl to trait)
 - #52703 (Improve a few vectors - calculate capacity or build from iterators)
 - #52740 (Suggest underscore when using dashes in crate namet push fork)
 - #52759 (Impl Send & Sync for JoinHandle)
 - #52760 (rustc_metadata: test loading atoi instead of cos)
 - #52763 (Omit the vendor component in Fuchsia triple)
 - #52765 (Remove unused "-Zenable_nonzeroing_move_hints" flag)
 - #52769 (Incorporate a stray test)
 - #52777 (Fix doc comment for 'ptr::copy_to' method)
 - #52779 (revert accidental atty downgrade)
 - #52781 (Use a slice where a vector is not necessary)

Failed merges:

r? @ghost

2 files changed, 12 insertions, 0 deletions

diff --git a/src/liballoc/tests/lib.rs b/src/liballoc/tests/lib.rs
index 91bc778ad4c..618aff963f2 100644
--- a/src/liballoc/tests/lib.rs
+++ b/src/liballoc/tests/lib.rs
@@ -24,6 +24,7 @@
 #![feature(try_reserve)]
 #![feature(unboxed_closures)]
 #![feature(exact_chunks)]
+#![feature(repeat_generic_slice)]
 
 extern crate alloc_system;
 extern crate core;
diff --git a/src/liballoc/tests/slice.rs b/src/liballoc/tests/slice.rs
index 3b7eec38609..df5e18a9a18 100644
--- a/src/liballoc/tests/slice.rs
+++ b/src/liballoc/tests/slice.rs
@@ -1529,3 +1529,14 @@ fn panic_safe() {
         }
     }
 }
+
+#[test]
+fn repeat_generic_slice() {
+    assert_eq!([1, 2].repeat(2), vec![1, 2, 1, 2]);
+    assert_eq!([1, 2, 3, 4].repeat(0), vec![]);
+    assert_eq!([1, 2, 3, 4].repeat(1), vec![1, 2, 3, 4]);
+    assert_eq!(
+        [1, 2, 3, 4].repeat(3),
+        vec![1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4]
+    );
+}