rust/tests/ui/regions/region-bound-on-closure-outlives-call.rs

fn call_rec<F>(mut f: F) -> usize where F: FnMut(usize) -> usize {
    //~^ WARN function cannot return without recursing
    (|x| f(x))(call_rec(f)) //~ ERROR cannot move out of `f`
}

fn main() {}
Update compile fail tests to use usize. 2015-01-08 05:02:42 -06:00			`fn call_rec<F>(mut f: F) -> usize where F: FnMut(usize) -> usize {`
Rewrite the `UnconditionalRecursion` lint to use MIR Part of #51002 2018-09-11 20:35:08 -05:00			`//~^ WARN function cannot return without recursing`
remove all kind annotations from closures 2015-02-01 11:44:15 -06:00			(\|x\| f(x))(call_rec(f)) //~ ERROR cannot move out of `f`
librustc: Make sure region bounds on closures outlive calls to them. This can break code like: fn call_rec(f: \|uint\| -> uint) -> uint { (\|x\| f(x))(call_rec(f)) } Change this code to use a temporary instead of violating the borrow rules: fn call_rec(f: \|uint\| -> uint) -> uint { let tmp = call_rec(\|x\| f(x)); f(tmp) } Closes #17144. [breaking-change] 2014-09-11 13:59:05 -05:00			`}`

			`fn main() {}`