src/test/ui/lint/must_use-in-stdlib-traits.stderr

   1 error: unused implementer of `Iterator` that must be used
   2   --> $DIR/must_use-in-stdlib-traits.rs:42:4
   3    |
   4 LL |    iterator();
   5    |    ^^^^^^^^^^^
   6    |
   7 note: the lint level is defined here
   8   --> $DIR/must_use-in-stdlib-traits.rs:1:9
   9    |
  10 LL | #![deny(unused_must_use)]
  11    |         ^^^^^^^^^^^^^^^
  12    = note: iterators are lazy and do nothing unless consumed
  13
  14 error: unused implementer of `Future` that must be used
  15   --> $DIR/must_use-in-stdlib-traits.rs:43:4
  16    |
  17 LL |    future();
  18    |    ^^^^^^^^^
  19    |
  20    = note: futures do nothing unless you `.await` or poll them
  21
  22 error: unused implementer of `FnOnce` that must be used
  23   --> $DIR/must_use-in-stdlib-traits.rs:44:4
  24    |
  25 LL |    square_fn_once();
  26    |    ^^^^^^^^^^^^^^^^^
  27    |
  28    = note: closures are lazy and do nothing unless called
  29
  30 error: unused implementer of `FnMut` that must be used
  31   --> $DIR/must_use-in-stdlib-traits.rs:45:4
  32    |
  33 LL |    square_fn_mut();
  34    |    ^^^^^^^^^^^^^^^^
  35    |
  36    = note: closures are lazy and do nothing unless called
  37
  38 error: unused implementer of `Fn` that must be used
  39   --> $DIR/must_use-in-stdlib-traits.rs:46:4
  40    |
  41 LL |    square_fn();
  42    |    ^^^^^^^^^^^^
  43    |
  44    = note: closures are lazy and do nothing unless called
  45
  46 error: aborting due to 5 previous errors
  47