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1 You tried to supply an `Fn`-based type with an incorrect number of arguments
2 than what was expected.
3
4 Erroneous code example:
5
6 ```compile_fail,E0593
7 fn foo<F: Fn()>(x: F) { }
8
9 fn main() {
10 // [E0593] closure takes 1 argument but 0 arguments are required
11 foo(|y| { });
12 }
13 ```