tests/ui/closures/closure-no-fn-4.stderr

   1 error[E0308]: `match` arms have incompatible types
   2   --> $DIR/closure-no-fn-4.rs:5:18
   3    |
   4 LL |       let _: fn(usize) -> usize = match true {
   5    |  _________________________________-
   6 LL | |         true => |a| a + 1,
   7    | |                 --------- this is found to be of type `fn(usize) -> usize`
   8 LL | |         false => |a| a - b,
   9    | |                  ^^^^^^^^^ expected fn pointer, found closure
  10 LL | |
  11 LL | |     };
  12    | |_____- `match` arms have incompatible types
  13    |
  14    = note: expected fn pointer `fn(usize) -> usize`
  15                  found closure `[closure@$DIR/closure-no-fn-4.rs:5:18: 5:21]`
  16 note: closures can only be coerced to `fn` types if they do not capture any variables
  17   --> $DIR/closure-no-fn-4.rs:5:26
  18    |
  19 LL |         false => |a| a - b,
  20    |                          ^ `b` captured here
  21
  22 error: aborting due to previous error
  23
  24 For more information about this error, try `rustc --explain E0308`.