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//@ test-mir-pass: ScalarReplacementOfAggregates
//@ compile-flags: -Cpanic=abort
//@ no-prefer-dynamic
trait Err {
type Err;
}
struct Foo<T: Err> {
// Check that the `'static` lifetime is erased when creating the local for `x`,
// even if we fail to normalize the type.
x: Result<Box<dyn std::fmt::Display + 'static>, <T as Err>::Err>,
y: u32,
}
// EMIT_MIR lifetimes.foo.ScalarReplacementOfAggregates.diff
fn foo<T: Err>() {
// CHECK-LABEL: fn foo(
// CHECK-NOT: [foo:_.*]: Foo
// CHECK-NOT: Box<dyn std::fmt::Display + 'static>
let foo: Foo<T> = Foo { x: Ok(Box::new(5_u32)), y: 7_u32 };
let x = foo.x;
let y = foo.y;
if let Ok(x) = x {
eprintln!("{x} {y}");
}
}
impl Err for () {
type Err = ();
}
fn main() {
foo::<()>()
}
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