Update test after const_ptr functions are must_use now

Author: flip1995

tests/ui/ptr_offset_with_cast.fixed

@@ -9,12 +9,12 @@ fn main() {
     let offset_isize = 1_isize;
 
     unsafe {
-        ptr.add(offset_usize);
-        ptr.offset(offset_isize as isize);
-        ptr.offset(offset_u8 as isize);
+        let _ = ptr.add(offset_usize);
+        let _ = ptr.offset(offset_isize as isize);
+        let _ = ptr.offset(offset_u8 as isize);
 
-        ptr.wrapping_add(offset_usize);
-        ptr.wrapping_offset(offset_isize as isize);
-        ptr.wrapping_offset(offset_u8 as isize);
+        let _ = ptr.wrapping_add(offset_usize);
+        let _ = ptr.wrapping_offset(offset_isize as isize);
+        let _ = ptr.wrapping_offset(offset_u8 as isize);
     }
 }

tests/ui/ptr_offset_with_cast.rs

@@ -9,12 +9,12 @@ fn main() {
     let offset_isize = 1_isize;
 
     unsafe {
-        ptr.offset(offset_usize as isize);
-        ptr.offset(offset_isize as isize);
-        ptr.offset(offset_u8 as isize);
+        let _ = ptr.offset(offset_usize as isize);
+        let _ = ptr.offset(offset_isize as isize);
+        let _ = ptr.offset(offset_u8 as isize);
 
-        ptr.wrapping_offset(offset_usize as isize);
-        ptr.wrapping_offset(offset_isize as isize);
-        ptr.wrapping_offset(offset_u8 as isize);
+        let _ = ptr.wrapping_offset(offset_usize as isize);
+        let _ = ptr.wrapping_offset(offset_isize as isize);
+        let _ = ptr.wrapping_offset(offset_u8 as isize);
     }
 }

tests/ui/ptr_offset_with_cast.stderr

@@ -1,16 +1,16 @@
 error: use of `offset` with a `usize` casted to an `isize`
-  --> $DIR/ptr_offset_with_cast.rs:12:9
+  --> $DIR/ptr_offset_with_cast.rs:12:17
    |
-LL |         ptr.offset(offset_usize as isize);
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr.add(offset_usize)`
+LL |         let _ = ptr.offset(offset_usize as isize);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr.add(offset_usize)`
    |
    = note: `-D clippy::ptr-offset-with-cast` implied by `-D warnings`
 
 error: use of `wrapping_offset` with a `usize` casted to an `isize`
-  --> $DIR/ptr_offset_with_cast.rs:16:9
+  --> $DIR/ptr_offset_with_cast.rs:16:17
    |
-LL |         ptr.wrapping_offset(offset_usize as isize);
-   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr.wrapping_add(offset_usize)`
+LL |         let _ = ptr.wrapping_offset(offset_usize as isize);
+   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `ptr.wrapping_add(offset_usize)`
 
 error: aborting due to 2 previous errors