rust/tests/ui/did_you_mean/issue-31424.rs

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// forbid-output: &mut mut self
struct Struct;
impl Struct {
fn foo(&mut self) {
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(&mut self).bar(); //~ ERROR cannot borrow
//~^ HELP try removing `&mut` here
}
// In this case we could keep the suggestion, but to distinguish the
// two cases is pretty hard. It's an obscure case anyway.
fn bar(self: &mut Self) {
//~^ WARN function cannot return without recursing
//~^^ HELP a `loop` may express intention better if this is on purpose
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(&mut self).bar(); //~ ERROR cannot borrow
//~^ HELP try removing `&mut` here
}
}
fn main () {}