rust/tests/ui/unboxed-closures/unboxed-closures-infer-fnmu...

9 lines
261 B
Rust

// Test that we are able to infer a suitable kind for this closure
// that is just called (`FnMut`).
fn main() {
let mut counter = 0;
let tick = || counter += 1;
tick(); //~ ERROR cannot borrow `tick` as mutable, as it is not declared as mutable
}