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//@ run-pass
fn foo<'r>() {
let maybe_value_ref: Option<&'r u8> = None;
let _ = maybe_value_ref.map(|& ref v| v);
let _ = maybe_value_ref.map(|& ref v| -> &'r u8 {v});
let _ = maybe_value_ref.map(|& ref v: &'r u8| -> &'r u8 {v});
let _ = maybe_value_ref.map(|& ref v: &'r u8| {v});
}
fn main() {
foo();
}
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