Test u32_T_where_T_Is_impls

Source location: tests/coherence_overlap.rs:190

#[test]
fn u32_T_where_T_Is_impls() {
    FormalityTest::new(crates![crate core {
        trait Foo {}
        impl Foo for u32 {}
        impl<T> Foo for T where T: Is {}

        trait Is {}
        impl Is for u32 {}
    }])
    .err(expect_test::expect![[r#"
            the rule "check_coherence" at (coherence.rs) failed because
              impls may overlap:
              impl Foo for u32 { }
              impl <ty> Foo for ^ty0_0 where ^ty0_0 : Is { }"#]])
}

Rules proved (0)

This test records no positive coverage.

Premises failed (3)

The last column links to the premise’s page when the judgment view counts this failure against that premise. It does not when the premise is read as infallible, or when the failure was blamed inside a multi-line premise that carries no record on its own first line.

Proof trees