1error[E0308]: mismatched types
2  --> tests/ui-msrv/transmute-mut-src-immutable.rs:17:37
3   |
417 |     let _: &mut u8 = transmute_mut!(&0u8);
5   |                      ---------------^^^^-
6   |                      |              |
7   |                      |              types differ in mutability
8   |                      expected due to this
9   |
10   = note: expected mutable reference `&mut _`
11                      found reference `&u8`
12