add #[must_use] to functions of slice and its iterators.

diff --git a/library/core/tests/slice.rs b/library/core/tests/slice.rs
index 7c4d2f266f958753839fedb347b1696a2c496438..798fcc3dfde978ce961ba3dd9e12257fc89288f2 100644 (file)
--- a/library/core/tests/slice.rs
+++ b/library/core/tests/slice.rs
@@ -2344,7 +2344,7 @@ fn slice_rsplit_array_mut() {
 fn slice_split_array_ref_out_of_bounds() {
     let v = &[1, 2, 3, 4, 5, 6][..];
 
-    v.split_array_ref::<7>();
+    let _ = v.split_array_ref::<7>();
 }
 
 #[should_panic]
@@ -2352,7 +2352,7 @@ fn slice_split_array_ref_out_of_bounds() {
 fn slice_split_array_mut_out_of_bounds() {
     let v = &mut [1, 2, 3, 4, 5, 6][..];
 
-    v.split_array_mut::<7>();
+    let _ = v.split_array_mut::<7>();
 }
 
 #[should_panic]
@@ -2360,7 +2360,7 @@ fn slice_split_array_mut_out_of_bounds() {
 fn slice_rsplit_array_ref_out_of_bounds() {
     let v = &[1, 2, 3, 4, 5, 6][..];
 
-    v.rsplit_array_ref::<7>();
+    let _ = v.rsplit_array_ref::<7>();
 }
 
 #[should_panic]
@@ -2368,7 +2368,7 @@ fn slice_rsplit_array_ref_out_of_bounds() {
 fn slice_rsplit_array_mut_out_of_bounds() {
     let v = &mut [1, 2, 3, 4, 5, 6][..];
 
-    v.rsplit_array_mut::<7>();
+    let _ = v.rsplit_array_mut::<7>();
 }
 
 macro_rules! take_tests {