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variance-issue-20533.rs
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variance-issue-20533.rs
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// Regression test for issue #20533. At some point, only 1 out of the
// 3 errors below were being reported.
use std::marker::PhantomData;
fn foo<'a, T>(_x: &'a T) -> PhantomData<&'a ()> {
PhantomData
}
struct Wrap<T>(T);
fn bar<'a, T>(_x: &'a T) -> Wrap<PhantomData<&'a ()>> {
Wrap(PhantomData)
}
struct Baked<'a>(PhantomData<&'a ()>);
fn baz<'a, T>(_x: &'a T) -> Baked<'a> {
Baked(PhantomData)
}
fn bat(x: &AffineU32) -> &u32 {
&x.0
}
struct AffineU32(u32);
#[derive(Clone)]
struct ClonableAffineU32(u32);
fn main() {
{
let a = AffineU32(1);
let x = foo(&a);
drop(a); //~ ERROR cannot move out of `a`
drop(x);
}
{
let a = AffineU32(1);
let x = bar(&a);
drop(a); //~ ERROR cannot move out of `a`
drop(x);
}
{
let a = AffineU32(1);
let x = baz(&a);
drop(a); //~ ERROR cannot move out of `a`
drop(x);
}
{
let a = AffineU32(1);
let x = bat(&a);
drop(a); //~ ERROR cannot move out of `a`
drop(x);
}
{
let a = ClonableAffineU32(1);
let x = foo(&a);
drop(a); //~ ERROR cannot move out of `a`
drop(x);
}
}