Test test_normalize_assoc_ty_existential0

Source location: crates/formality-rust/src/prove/test/eq_assumptions.rs:41

#[test]
fn test_normalize_assoc_ty_existential0() {
    test_prove(
        Program::empty(),
        term("exists<A> {} => {for<T> if { <T as Iterator>::Item = u32 } <A as Iterator>::Item = u32}"),
    ).assert_err(
    expect![[r#"
        crates/formality-rust/src/prove/prove_via.rs:8:1: no applicable rules for prove_via { goal: <?ty_0 as Iterator>::Item = u32, via: <!ty_1 as Iterator>::Item = u32, assumptions: {<!ty_1 as Iterator>::Item = u32}, env: Env { variables: [?ty_0, !ty_1], bias: Soundness, pending: [], allow_pending_outlives: false } }

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_1)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_1)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "normalize-via-impl" at (prove_normalize.rs) failed because
          expression evaluated to an empty collection: `decls.alias_eq_decls(&a.name)`

        crates/formality-rust/src/prove/prove_via.rs:8:1: no applicable rules for prove_via { goal: <!ty_0 as Iterator>::Item = <?ty_1 as Iterator>::Item, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        crates/formality-rust/src/prove/prove_via.rs:8:1: no applicable rules for prove_via { goal: !ty_0 = ?ty_1, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        crates/formality-rust/src/prove/prove_normalize.rs:54:1: no applicable rules for prove_normalize_via { goal: ?ty_1, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        crates/formality-rust/src/prove/prove_via.rs:8:1: no applicable rules for prove_via { goal: u32 = <?ty_1 as Iterator>::Item, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "normalize-via-impl" at (prove_normalize.rs) failed because
          expression evaluated to an empty collection: `decls.alias_eq_decls(&a.name)`

        crates/formality-rust/src/prove/prove_via.rs:8:1: no applicable rules for prove_via { goal: ?ty_1 = !ty_0, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        crates/formality-rust/src/prove/prove_normalize.rs:54:1: no applicable rules for prove_normalize_via { goal: ?ty_1, via: <!ty_0 as Iterator>::Item = u32, assumptions: {<!ty_0 as Iterator>::Item = u32}, env: Env { variables: [?ty_1, !ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "existential-nonvar" at (prove_eq.rs) failed because
          pattern `None` did not match value `Some(!ty_0)`

        the rule "existential-universal" at (prove_eq.rs) failed because
          condition evaluated to false: `env.universe(p) < env.universe(v)`

        the rule "normalize-via-impl" at (prove_normalize.rs) failed because
          expression evaluated to an empty collection: `decls.alias_eq_decls(&a.name)`"#]]);
}

Rules proved (0)

This test records no positive coverage.

Premises failed (19)

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