src/test/ui/lint/lint-const-item-mutation.stderr

   1 warning: attempting to modify a `const` item
   2   --> $DIR/lint-const-item-mutation.rs:35:5
   3    |
   4 LL |     ARRAY[0] = 5;
   5    |     ^^^^^^^^^^^^
   6    |
   7    = note: `#[warn(const_item_mutation)]` on by default
   8    = note: each usage of a `const` item creates a new temporary; the original `const` item will not be modified
   9 note: `const` item defined here
  10   --> $DIR/lint-const-item-mutation.rs:26:1
  11    |
  12 LL | const ARRAY: [u8; 1] = [25];
  13    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  14
  15 warning: attempting to modify a `const` item
  16   --> $DIR/lint-const-item-mutation.rs:36:5
  17    |
  18 LL |     MY_STRUCT.field = false;
  19    |     ^^^^^^^^^^^^^^^^^^^^^^^
  20    |
  21    = note: each usage of a `const` item creates a new temporary; the original `const` item will not be modified
  22 note: `const` item defined here
  23   --> $DIR/lint-const-item-mutation.rs:27:1
  24    |
  25 LL | const MY_STRUCT: MyStruct = MyStruct { field: true, inner_array: ['a'], raw_ptr: 2 as *mut u8 };
  26    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  27
  28 warning: attempting to modify a `const` item
  29   --> $DIR/lint-const-item-mutation.rs:37:5
  30    |
  31 LL |     MY_STRUCT.inner_array[0] = 'b';
  32    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  33    |
  34    = note: each usage of a `const` item creates a new temporary; the original `const` item will not be modified
  35 note: `const` item defined here
  36   --> $DIR/lint-const-item-mutation.rs:27:1
  37    |
  38 LL | const MY_STRUCT: MyStruct = MyStruct { field: true, inner_array: ['a'], raw_ptr: 2 as *mut u8 };
  39    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  40
  41 warning: taking a mutable reference to a `const` item
  42   --> $DIR/lint-const-item-mutation.rs:38:5
  43    |
  44 LL |     MY_STRUCT.use_mut();
  45    |     ^^^^^^^^^^^^^^^^^^^
  46    |
  47    = note: each usage of a `const` item creates a new temporary
  48    = note: the mutable reference will refer to this temporary, not the original `const` item
  49 note: mutable reference created due to call to this method
  50   --> $DIR/lint-const-item-mutation.rs:9:5
  51    |
  52 LL |     fn use_mut(&mut self) {}
  53    |     ^^^^^^^^^^^^^^^^^^^^^
  54 note: `const` item defined here
  55   --> $DIR/lint-const-item-mutation.rs:27:1
  56    |
  57 LL | const MY_STRUCT: MyStruct = MyStruct { field: true, inner_array: ['a'], raw_ptr: 2 as *mut u8 };
  58    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  59
  60 warning: taking a mutable reference to a `const` item
  61   --> $DIR/lint-const-item-mutation.rs:39:5
  62    |
  63 LL |     &mut MY_STRUCT;
  64    |     ^^^^^^^^^^^^^^
  65    |
  66    = note: each usage of a `const` item creates a new temporary
  67    = note: the mutable reference will refer to this temporary, not the original `const` item
  68 note: `const` item defined here
  69   --> $DIR/lint-const-item-mutation.rs:27:1
  70    |
  71 LL | const MY_STRUCT: MyStruct = MyStruct { field: true, inner_array: ['a'], raw_ptr: 2 as *mut u8 };
  72    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  73
  74 warning: taking a mutable reference to a `const` item
  75   --> $DIR/lint-const-item-mutation.rs:40:5
  76    |
  77 LL |     (&mut MY_STRUCT).use_mut();
  78    |     ^^^^^^^^^^^^^^^^
  79    |
  80    = note: each usage of a `const` item creates a new temporary
  81    = note: the mutable reference will refer to this temporary, not the original `const` item
  82 note: `const` item defined here
  83   --> $DIR/lint-const-item-mutation.rs:27:1
  84    |
  85 LL | const MY_STRUCT: MyStruct = MyStruct { field: true, inner_array: ['a'], raw_ptr: 2 as *mut u8 };
  86    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  87
  88 warning: attempting to modify a `const` item
  89   --> $DIR/lint-const-item-mutation.rs:52:5
  90    |
  91 LL |     MUTABLE2.msg = "wow";
  92    |     ^^^^^^^^^^^^^^^^^^^^
  93    |
  94    = note: each usage of a `const` item creates a new temporary; the original `const` item will not be modified
  95 note: `const` item defined here
  96   --> $DIR/lint-const-item-mutation.rs:30:1
  97    |
  98 LL | const MUTABLE2: Mutable2 = Mutable2 { msg: "", other: String::new() };
  99    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 100
 101 warning: taking a mutable reference to a `const` item
 102   --> $DIR/lint-const-item-mutation.rs:53:5
 103    |
 104 LL |     VEC.push(0);
 105    |     ^^^^^^^^^^^
 106    |
 107    = note: each usage of a `const` item creates a new temporary
 108    = note: the mutable reference will refer to this temporary, not the original `const` item
 109 note: mutable reference created due to call to this method
 110   --> $SRC_DIR/alloc/src/vec.rs:LL:COL
 111    |
 112 LL | /     pub fn push(&mut self, value: T) {
 113 LL | |         // This will panic or abort if we would allocate > isize::MAX bytes
 114 LL | |         // or if the length increment would overflow for zero-sized types.
 115 LL | |         if self.len == self.buf.capacity() {
 116 ...  |
 117 LL | |         }
 118 LL | |     }
 119    | |_____^
 120 note: `const` item defined here
 121   --> $DIR/lint-const-item-mutation.rs:31:1
 122    |
 123 LL | const VEC: Vec<i32> = Vec::new();
 124    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 125
 126 warning: 8 warnings emitted
 127