Negative coverage: prove_wc / trait well formed / premise for_all(decls, env, assumptions, &trait_ref.parameters, &prove_wf) => c
Premise at line 139. Observed failure causes: failed_judgment.
trait well formed| Line | Coverage | Source |
|---|---|---|
| 139 | 1 | (for_all(decls, env, assumptions, &trait_ref.parameters, &prove_wf) => c) |
| 140 | N/A | (let t = decls.trait_decl(&trait_ref.trait_id)) |
| 141 | N/A | (let t = t.binder.instantiate_with(&trait_ref.parameters).unwrap()) |
| 142 | 2 | (prove_after(decls, c, assumptions, &t.where_clause) => c) |
| ──────── ("trait well formed") | ||
| 144 | 19 | (prove_wc(decls, env, assumptions, Predicate::WellFormedTraitRef(trait_ref)) => c) |
1 test failed proving this premise:
Source location: tests/well_formed_trait_ref.rs:37
#[test]
fn missing_dependent_where_clause() {
FormalityTest::new(crates![crate foo {
trait Trait1 {}
trait Trait2 {}
struct S1<T> where T: Trait1 {
dummy: T,
}
struct S2<T> where S1<T> : Trait2 {
dummy: T,
}
}])
.err(expect_test::expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: @ WellFormedTraitRef(Trait2(S1<!ty_0>)), via: Trait2(S1<!ty_0>), assumptions: {Trait2(S1<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: Trait1(!ty_0), via: Trait2(S1<!ty_0>), assumptions: {Trait2(S1<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
the rule "trait implied bound" at (prove_wc.rs) failed because
expression evaluated to an empty collection: `decls.trait_invariants()`"#]])
}Failed proof tree
check_all_crates failedmod.rs:41rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60rule "check crate"mod.rs:73check_crate_item failedmod.rs:163rule "adt"mod.rs:185check_adt failedadts.rs:11rule "check adt"adts.rs:21prove failedfunction.rs:250rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "trait well formed"prove_wc.rs:139prove_wf failedprove_wf.rs:14rule "ADT"prove_wf.rs:67prove_after failedprove_after.rs:8rule "prove_after"prove_after.rs:19prove failedprove_after.rs:19ruleprove_after.rs:19prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "assumption - predicate"prove_wc.rs:50prove_via failedprove_via.rs:9
rule "trait implied bound"prove_wc.rs:117 (failed: empty_collection)