rust/tests/ui/lifetimes/unnamed-closure-doesnt-life-long-enough-issue-67634.rs

fn main() {
    [0].iter().flat_map(|a| [0].iter().map(|_| &a)); //~ ERROR closure may outlive
}
Do not ICE on lifetime error involving closures 2019-12-28 15:51:29 -06:00			`fn main() {`
Use an 'approximate' universal upper bound when reporting region errors Fixes #67765 When reporting errors during MIR region inference, we sometimes use `universal_upper_bound` to obtain a named universal region that we can display to the user. However, this is not always possible - in a case like `fn foo<'a, 'b>() { .. }`, the only upper bound for a region containing `'a` and `'b` is `'static`. When displaying diagnostics, it's usually better to display some named region (even if there are multiple involved) rather than fall back to a generic error involving `'static`. This commit adds a new `approx_universal_upper_bound` method, which uses the lowest-numbered universal region if the only alternative is to return `'static`. 2020-06-27 12:54:56 -05:00			`[0].iter().flat_map(\|a\| [0].iter().map(\|_\| &a)); //~ ERROR closure may outlive`
Do not ICE on lifetime error involving closures 2019-12-28 15:51:29 -06:00			`}`