Negative coverage: check_crate_item / trait impl / premise check_drop_impl_always_applicable(program, v) => ()
Premise at line 179. Observed failure causes: failed_judgment.
trait impl| Line | Coverage | Source |
|---|---|---|
| 178 | 8 | (check_trait_impl(program, v, crate_id) => ()) |
| 179 | 3 | (check_drop_impl_always_applicable(program, v) => ()) |
| ──────── ("trait impl") | ||
| 181 | 110 | (check_crate_item(program, CrateItem::TraitImpl(v), crate_id) => ()) |
3 tests failed proving this premise:
Source location: tests/drop.rs:99
#[test]
fn drop_impl_extra_where_clause() {
FormalityTest::new(crates![
crate Foo {
trait Clone {}
struct MyStruct<T> {
value: T,
}
impl<T> Drop for MyStruct<T> where T: Clone {}
}
])
.err(expect_test::expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: Clone(!ty_0), via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!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()`
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 "trait impl"mod.rs:179check_drop_impl_always_applicable failedimpls.rs:284rule "Drop impl is always applicable"impls.rs:311prove failedfunction.rs:250rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "positive impl"prove_wc.rs:82prove_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)
rule "trait implied bound"prove_wc.rs:117 (failed: empty_collection)
Source location: tests/drop.rs:121
#[test]
fn drop_impl_concrete_type_param() {
FormalityTest::new(crates![
crate Foo {
struct MyStruct<T> {
value: T,
}
impl Drop for MyStruct<u32> {}
}
])
.err(expect_test::expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: MyStruct<!ty_0> = MyStruct<u32>, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: MyStruct<!ty_0>, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!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: !ty_0 = u32, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: !ty_0, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: u32, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: MyStruct<u32>, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!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: u32 = !ty_0, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: u32, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!ty_0>)}, env: Env { variables: [!ty_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:55:1: no applicable rules for prove_normalize_via { goal: !ty_0, via: Drop(MyStruct<!ty_0>), assumptions: {Drop(MyStruct<!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 "trait impl"mod.rs:179check_drop_impl_always_applicable failedimpls.rs:284rule "Drop impl is always applicable"impls.rs:311prove failedfunction.rs:250rulefunction.rs:250prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "positive impl"prove_wc.rs:81prove failedprove_wc.rs:81ruleprove_wc.rs:81prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "assumption - relation"prove_wc.rs:56prove_via failedprove_via.rs:9
rule "eq"prove_wc.rs:127prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "rigid"prove_eq.rs:49prove failedprove_eq.rs:49ruleprove_eq.rs:49prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "assumption - relation"prove_wc.rs:56prove_via failedprove_via.rs:9
rule "eq"prove_wc.rs:127prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "symmetric"prove_eq.rs:40prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "symmetric"prove_eq.rs:40prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "rigid"prove_eq.rs:49prove failedprove_eq.rs:49ruleprove_eq.rs:49prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "assumption - relation"prove_wc.rs:56prove_via failedprove_via.rs:9
rule "eq"prove_wc.rs:127prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "symmetric"prove_eq.rs:40prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19rule "normalize-via-assumption"prove_normalize.rs:33prove_normalize_via failedprove_normalize.rs:55
rule "trait implied bound"prove_wc.rs:117 (failed: empty_collection)
Source location: tests/drop.rs:152
#[test]
fn drop_impl_for_non_adt() {
FormalityTest::new(crates![
crate Foo {
impl Drop for u32 {}
}
])
.err(expect_test::expect![[r#"
the rule "Drop impl is always applicable" at (impls.rs) failed because
Drop impl self type must be a struct or enum, got `u32`"#]])
}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 "trait impl"mod.rs:179check_drop_impl_always_applicable failedimpls.rs:284rule "Drop impl is always applicable"impls.rs:302 (failed: inapplicable)