src/test/ui/closures/closure-wrong-kind.stderr

   1 error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnOnce`
   2   --> $DIR/closure-wrong-kind.rs:10:19
   3    |
   4 LL |     let closure = |_| foo(x);
   5    |                   ^^^     - closure is `FnOnce` because it moves the variable `x` out of its environment
   6    |                   |
   7    |                   this closure implements `FnOnce`, not `Fn`
   8 LL |     bar(closure);
   9    |     --- ------- the requirement to implement `Fn` derives from here
  10    |     |
  11    |     required by a bound introduced by this call
  12    |
  13 note: required by a bound in `bar`
  14   --> $DIR/closure-wrong-kind.rs:6:11
  15    |
  16 LL | fn bar<T: Fn(u32)>(_: T) {}
  17    |           ^^^^^^^ required by this bound in `bar`
  18
  19 error: aborting due to previous error
  20
  21 For more information about this error, try `rustc --explain E0525`.