error[E0764]: mutable references are not allowed in the final value of constants --> $DIR/issue-17718-const-bad-values.rs:1:34 | LL | const C1: &'static mut [usize] = &mut []; | ^^^^^^^ error[E0013]: constants cannot refer to statics --> $DIR/issue-17718-const-bad-values.rs:5:46 | LL | const C2: &'static mut usize = unsafe { &mut S }; | ^ | = help: consider extracting the value of the `static` to a `const`, and referring to that error[E0013]: constants cannot refer to statics --> $DIR/issue-17718-const-bad-values.rs:5:46 | LL | const C2: &'static mut usize = unsafe { &mut S }; | ^ | = help: consider extracting the value of the `static` to a `const`, and referring to that = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error: aborting due to 3 previous errors Some errors have detailed explanations: E0013, E0764. For more information about an error, try `rustc --explain E0013`.