Auto merge of rust-lang#111778 - Dylan-DPC:rollup-107ig9h, r=Dylan-DPC

Rollup of 10 pull requests

Successful merges:

 - rust-lang#111491 (Dont check `must_use` on nested `impl Future` from fn)
 - rust-lang#111606 (very minor cleanups)
 - rust-lang#111619 (Add timings for MIR passes to profiling report)
 - rust-lang#111652 (Better diagnostic for `use Self::..`)
 - rust-lang#111665 (Add more tests for the offset_of macro)
 - rust-lang#111708 (Give a more useful location for where a span_bug was delayed)
 - rust-lang#111715 (Fix doc comment for `ConstParamTy` derive)
 - rust-lang#111723 (style: do not overwrite obligations)
 - rust-lang#111743 (Improve cgu merging debug output)
 - rust-lang#111762 (fix: emit error when fragment is `MethodReceiverExpr` and items is empty)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

core/src/marker.rs

@@ -986,7 +986,7 @@ pub trait PointerLike {}
 #[rustc_on_unimplemented(message = "`{Self}` can't be used as a const parameter type")]
 pub trait ConstParamTy: StructuralEq {}
 
-/// Derive macro generating an impl of the trait `Copy`.
+/// Derive macro generating an impl of the trait `ConstParamTy`.
 #[rustc_builtin_macro]
 #[unstable(feature = "adt_const_params", issue = "95174")]
 #[cfg(not(bootstrap))]

core/tests/mem.rs

@@ -386,6 +386,21 @@ fn offset_of() {
     // Layout of tuples is unstable
     assert!(offset_of!((u8, u16), 0) <= size_of::<(u8, u16)>() - 1);
     assert!(offset_of!((u8, u16), 1) <= size_of::<(u8, u16)>() - 2);
+
+    #[repr(C)]
+    struct Generic<T> {
+        x: u8,
+        y: u32,
+        z: T
+    }
+
+    // Ensure that this type of generics works
+    fn offs_of_z<T>() -> usize {
+        offset_of!(Generic<T>, z)
+    }
+
+    assert_eq!(offset_of!(Generic<u8>, z), 8);
+    assert_eq!(offs_of_z::<u8>(), 8);
 }
 
 #[test]