1 error[E0017]: references in constants may only refer to immutable values
2 --> $DIR/projection_qualif.rs:6:27
4 LL | let b: *mut u32 = &mut a;
5 | ^^^^^^ constants require immutable values
7 error[E0019]: constant contains unimplemented expression type
8 --> $DIR/projection_qualif.rs:7:18
10 LL | unsafe { *b = 5; }
13 error[E0658]: dereferencing raw pointers in constants is unstable
14 --> $DIR/projection_qualif.rs:7:18
16 LL | unsafe { *b = 5; }
19 = note: for more information, see https://github.com/rust-lang/rust/issues/51911
20 = help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable
22 error: aborting due to 3 previous errors
24 Some errors have detailed explanations: E0017, E0019, E0658.
25 For more information about an error, try `rustc --explain E0017`.