src/test/ui/trivial_casts.stderr

   1 error: trivial numeric cast: `i32` as `i32`
   2   --> $DIR/trivial_casts.rs:16:13
   3    |
   4 LL |     let _ = 42_i32 as i32;
   5    |             ^^^^^^^^^^^^^
   6    |
   7 note: the lint level is defined here
   8   --> $DIR/trivial_casts.rs:4:24
   9    |
  10 LL | #![deny(trivial_casts, trivial_numeric_casts)]
  11    |                        ^^^^^^^^^^^^^^^^^^^^^
  12    = help: cast can be replaced by coercion; this might require a temporary variable
  13
  14 error: trivial numeric cast: `u8` as `u8`
  15   --> $DIR/trivial_casts.rs:19:13
  16    |
  17 LL |     let _ = 42_u8 as u8;
  18    |             ^^^^^^^^^^^
  19    |
  20    = help: cast can be replaced by coercion; this might require a temporary variable
  21
  22 error: trivial cast: `&u32` as `*const u32`
  23   --> $DIR/trivial_casts.rs:24:13
  24    |
  25 LL |     let _ = x as *const u32;
  26    |             ^^^^^^^^^^^^^^^
  27    |
  28 note: the lint level is defined here
  29   --> $DIR/trivial_casts.rs:4:9
  30    |
  31 LL | #![deny(trivial_casts, trivial_numeric_casts)]
  32    |         ^^^^^^^^^^^^^
  33    = help: cast can be replaced by coercion; this might require a temporary variable
  34
  35 error: trivial cast: `&mut u32` as `*mut u32`
  36   --> $DIR/trivial_casts.rs:28:13
  37    |
  38 LL |     let _ = x as *mut u32;
  39    |             ^^^^^^^^^^^^^
  40    |
  41    = help: cast can be replaced by coercion; this might require a temporary variable
  42
  43 error: trivial cast: `&[u32; 3]` as `&[u32]`
  44   --> $DIR/trivial_casts.rs:33:13
  45    |
  46 LL |     let _ = x as &[u32];
  47    |             ^^^^^^^^^^^
  48    |
  49    = help: cast can be replaced by coercion; this might require a temporary variable
  50
  51 error: trivial cast: `&[u32; 3]` as `*const [u32]`
  52   --> $DIR/trivial_casts.rs:34:13
  53    |
  54 LL |     let _ = x as *const [u32];
  55    |             ^^^^^^^^^^^^^^^^^
  56    |
  57    = help: cast can be replaced by coercion; this might require a temporary variable
  58
  59 error: trivial cast: `&mut [u32; 3]` as `&mut [u32]`
  60   --> $DIR/trivial_casts.rs:39:13
  61    |
  62 LL |     let _ = x as &mut [u32];
  63    |             ^^^^^^^^^^^^^^^
  64    |
  65    = help: cast can be replaced by coercion; this might require a temporary variable
  66
  67 error: trivial cast: `&mut [u32; 3]` as `*mut [u32]`
  68   --> $DIR/trivial_casts.rs:40:13
  69    |
  70 LL |     let _ = x as *mut [u32];
  71    |             ^^^^^^^^^^^^^^^
  72    |
  73    = help: cast can be replaced by coercion; this might require a temporary variable
  74
  75 error: trivial cast: `Box<[u32; 3]>` as `Box<[u32]>`
  76   --> $DIR/trivial_casts.rs:45:13
  77    |
  78 LL |     let _ = x as Box<[u32]>;
  79    |             ^^^^^^^^^^^^^^^
  80    |
  81    = help: cast can be replaced by coercion; this might require a temporary variable
  82
  83 error: trivial cast: `&Bar` as `&dyn Foo`
  84   --> $DIR/trivial_casts.rs:52:13
  85    |
  86 LL |     let _ = x as &dyn Foo;
  87    |             ^^^^^^^^^^^^^
  88    |
  89    = help: cast can be replaced by coercion; this might require a temporary variable
  90
  91 error: trivial cast: `&Bar` as `*const dyn Foo`
  92   --> $DIR/trivial_casts.rs:53:13
  93    |
  94 LL |     let _ = x as *const dyn Foo;
  95    |             ^^^^^^^^^^^^^^^^^^^
  96    |
  97    = help: cast can be replaced by coercion; this might require a temporary variable
  98
  99 error: trivial cast: `&mut Bar` as `&mut dyn Foo`
 100   --> $DIR/trivial_casts.rs:58:13
 101    |
 102 LL |     let _ = x as &mut dyn Foo;
 103    |             ^^^^^^^^^^^^^^^^^
 104    |
 105    = help: cast can be replaced by coercion; this might require a temporary variable
 106
 107 error: trivial cast: `&mut Bar` as `*mut dyn Foo`
 108   --> $DIR/trivial_casts.rs:59:13
 109    |
 110 LL |     let _ = x as *mut dyn Foo;
 111    |             ^^^^^^^^^^^^^^^^^
 112    |
 113    = help: cast can be replaced by coercion; this might require a temporary variable
 114
 115 error: trivial cast: `Box<Bar>` as `Box<dyn Foo>`
 116   --> $DIR/trivial_casts.rs:64:13
 117    |
 118 LL |     let _ = x as Box<dyn Foo>;
 119    |             ^^^^^^^^^^^^^^^^^
 120    |
 121    = help: cast can be replaced by coercion; this might require a temporary variable
 122
 123 error: trivial cast: `&fn(i32) {baz}` as `&dyn Fn(i32)`
 124   --> $DIR/trivial_casts.rs:70:13
 125    |
 126 LL |     let _ = &baz as &dyn Fn(i32);
 127    |             ^^^^^^^^^^^^^^^^^^^^
 128    |
 129    = help: cast can be replaced by coercion; this might require a temporary variable
 130
 131 error: trivial cast: `&[closure@$DIR/trivial_casts.rs:72:13: 72:25]` as `&dyn Fn(i32)`
 132   --> $DIR/trivial_casts.rs:73:13
 133    |
 134 LL |     let _ = &x as &dyn Fn(i32);
 135    |             ^^^^^^^^^^^^^^^^^^
 136    |
 137    = help: cast can be replaced by coercion; this might require a temporary variable
 138
 139 error: trivial cast: `&'a Bar` as `&'a Bar`
 140   --> $DIR/trivial_casts.rs:79:13
 141    |
 142 LL |     let _ = a as &'a Bar;
 143    |             ^^^^^^^^^^^^
 144    |
 145    = help: cast can be replaced by coercion; this might require a temporary variable
 146
 147 error: trivial cast: `&'b Bar` as `&'a Bar`
 148   --> $DIR/trivial_casts.rs:81:13
 149    |
 150 LL |     let _ = b as &'a Bar;
 151    |             ^^^^^^^^^^^^
 152    |
 153    = help: cast can be replaced by coercion; this might require a temporary variable
 154
 155 error: trivial cast: `&'b Bar` as `&'b Bar`
 156   --> $DIR/trivial_casts.rs:83:13
 157    |
 158 LL |     let _ = b as &'b Bar;
 159    |             ^^^^^^^^^^^^
 160    |
 161    = help: cast can be replaced by coercion; this might require a temporary variable
 162
 163 error: aborting due to 19 previous errors
 164