src/test/ui/error-codes/E0388.stderr

   1 warning: taking a mutable reference to a `const` item
   2   --> $DIR/E0388.rs:4:30
   3    |
   4 LL | const CR: &'static mut i32 = &mut C;
   5    |                              ^^^^^^
   6    |
   7    = note: `#[warn(const_item_mutation)]` on by default
   8    = note: each usage of a `const` item creates a new temporary
   9    = note: the mutable reference will refer to this temporary, not the original `const` item
  10 note: `const` item defined here
  11   --> $DIR/E0388.rs:2:1
  12    |
  13 LL | const C: i32 = 2;
  14    | ^^^^^^^^^^^^^^^^^
  15
  16 error[E0764]: mutable references are not allowed in constants
  17   --> $DIR/E0388.rs:4:30
  18    |
  19 LL | const CR: &'static mut i32 = &mut C;
  20    |                              ^^^^^^ `&mut` is only allowed in `const fn`
  21
  22 error[E0764]: mutable references are not allowed in statics
  23   --> $DIR/E0388.rs:6:39
  24    |
  25 LL | static STATIC_REF: &'static mut i32 = &mut X;
  26    |                                       ^^^^^^ `&mut` is only allowed in `const fn`
  27
  28 error[E0596]: cannot borrow immutable static item `X` as mutable
  29   --> $DIR/E0388.rs:6:39
  30    |
  31 LL | static STATIC_REF: &'static mut i32 = &mut X;
  32    |                                       ^^^^^^ cannot borrow as mutable
  33
  34 warning: taking a mutable reference to a `const` item
  35   --> $DIR/E0388.rs:9:38
  36    |
  37 LL | static CONST_REF: &'static mut i32 = &mut C;
  38    |                                      ^^^^^^
  39    |
  40    = note: each usage of a `const` item creates a new temporary
  41    = note: the mutable reference will refer to this temporary, not the original `const` item
  42 note: `const` item defined here
  43   --> $DIR/E0388.rs:2:1
  44    |
  45 LL | const C: i32 = 2;
  46    | ^^^^^^^^^^^^^^^^^
  47
  48 error[E0764]: mutable references are not allowed in statics
  49   --> $DIR/E0388.rs:9:38
  50    |
  51 LL | static CONST_REF: &'static mut i32 = &mut C;
  52    |                                      ^^^^^^ `&mut` is only allowed in `const fn`
  53
  54 error: aborting due to 4 previous errors; 2 warnings emitted
  55
  56 Some errors have detailed explanations: E0596, E0764.
  57 For more information about an error, try `rustc --explain E0596`.