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#![crate_type = "lib"]
// This is part of a collection of regression tests related to the NLL problem case 3 that was
// deferred from the implementation of the NLL RFC, and left to be implemented by polonius. They are
// from open issues, e.g. tagged fixed-by-polonius, to ensure that the polonius alpha analysis does
// handle them, as does the datalog implementation.
//@ ignore-compare-mode-polonius (explicit revisions)
//@ revisions: nll polonius legacy
//@ [nll] known-bug: #58787
//@ [polonius] check-pass
//@ [polonius] compile-flags: -Z polonius=next
//@ [legacy] check-pass
//@ [legacy] compile-flags: -Z polonius=legacy
struct Node {
rest: List,
}
struct List(Option<Box<Node>>);
fn issue_58787(arg: &mut List) {
let mut list = arg;
match list.0 {
Some(ref mut d) => {
if true {
list = &mut d.rest;
}
}
None => (),
}
match list.0 {
Some(ref mut d) => {
list = &mut d.rest;
}
None => (),
}
match list {
List(Some(d)) => {
if true {
list = &mut d.rest;
}
}
List(None) => (),
}
match list {
List(Some(d)) => {
list = &mut d.rest;
}
List(None) => (),
}
match &mut list.0 {
Some(d) => {
if true {
list = &mut d.rest;
}
}
None => (),
}
match &mut list.0 {
Some(d) => {
list = &mut d.rest;
}
None => (),
}
list.0 = None;
}
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