Negative coverage: prove_wc / positive impl / premise prove_after(decls, c, assumptions, &t.where_clause) => c
Premise at line 88. Observed failure causes: failed_judgment.
positive impl| Line | Coverage | Source |
|---|---|---|
| 65 | ✗ | (i in decls.impl_decls(&trait_ref.trait_id)) |
| 68 | N/A | (let (env, subst) = env.existential_substitution(&i.binder)) |
| 69 | N/A | (let i = i.binder.instantiate_with(&subst).unwrap()) |
| 73 | N/A | (let t = decls.trait_decl(&i.trait_ref.trait_id).binder.instantiate_with(&i.trait_ref.parameters).unwrap()) |
| 80 | N/A | (let co_assumptions = (assumptions, trait_ref)) |
| 81 | 6 | (prove(decls, env, co_assumptions, Wcs::all_eq(&trait_ref.parameters, &i.trait_ref.parameters)) => c) |
| 82 | 1 | (prove_after(decls, c, co_assumptions, &i.where_clause) => c) |
| 88 | 4 | (prove_after(decls, c, assumptions, &t.where_clause) => c) |
| ──────── ("positive impl") | ||
| 90 | 119 | (prove_wc(decls, env, assumptions, Predicate::IsImplemented(trait_ref)) => c.pop_subst(&subst)) |
4 tests failed proving this premise:
Source location: crates/formality-rust/src/prove/prove/test/magic_copy.rs:25
#[test]
fn all_t_not_magic() {
test_prove(decls(), term("{} => {for<T> Magic(T)}")).assert_err(
expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: !ty_0 = u32, via: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Magic(!ty_0), via: Copy(?ty_1), assumptions: {}, env: Env { variables: [!ty_0, ?ty_1], 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: Magic(!ty_1), via: Copy(?ty_2), assumptions: {}, env: Env { variables: [!ty_1, ?ty_2], bias: Soundness, pending: [], allow_pending_outlives: false } }"#]]);
}Failed proof tree
prove failedtest_util.rs:60ruletest_util.rs:60prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "forall"prove_wc.rs:37prove_wc failedprove_wc.rs:23rule "positive impl"prove_wc.rs:88prove_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 "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 "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:121prove_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 "trait implied bound"prove_wc.rs:120prove_via failedprove_via.rs:9
Source location: crates/formality-rust/src/prove/prove/test/magic_copy.rs:40
#[test]
fn all_t_not_copy() {
test_prove(decls(), term("{} => {for<T> Copy(T)}")).assert_err(
expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_via.rs:9:1: no applicable rules for prove_via { goal: !ty_0 = u32, via: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Copy(!ty_0), assumptions: {Copy(!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: Magic(!ty_0), via: Copy(?ty_1), assumptions: {}, env: Env { variables: [!ty_0, ?ty_1], bias: Soundness, pending: [], allow_pending_outlives: false } }"#]]);
}Failed proof tree
prove failedtest_util.rs:60ruletest_util.rs:60prove_wc_list failedprove_wc_list.rs:11rule "some"prove_wc_list.rs:29prove_wc failedprove_wc.rs:23rule "forall"prove_wc.rs:37prove_wc failedprove_wc.rs:23rule "trait implied bound"prove_wc.rs:121prove_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 "positive impl"prove_wc.rs:88prove_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 "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 "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
Source location: tests/consts.rs:32
#[test]
fn mismatch() {
FormalityTest::new(crates![crate Foo {
trait Foo<const C> where type_of_const C is bool {}
impl Foo<u32(42)> for u32 {}
}]).err(expect_test::expect![[r#"
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:19:1: no applicable rules for prove_normalize { p: u32, assumptions: {}, env: Env { variables: [], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_normalize.rs:19:1: no applicable rules for prove_normalize { p: bool, assumptions: {}, env: Env { variables: [], 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:178check_trait_impl failedimpls.rs:13rule "check_trait_impl"impls.rs:27prove 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:88prove_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 "const has ty"prove_wc.rs:168prove_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 "eq"prove_wc.rs:127prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19
rule "symmetric"prove_eq.rs:40prove_eq failedprove_eq.rs:25rule "normalize-l"prove_eq.rs:70prove_normalize failedprove_normalize.rs:19
Source location: tests/consts.rs:68
#[test]
fn generic_mismatch() {
FormalityTest::new(crates![crate Foo {
trait Foo<const C> where type_of_const C is bool {}
// Here, the impl is assuming C is u32, which mismatches the trait bound.
impl<const C> Foo<C> for u32 where type_of_const C is 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: Foo(u32, !const_0), via: @ ConstHasType(!const_0 , u32), assumptions: {@ ConstHasType(!const_0 , u32)}, env: Env { variables: [!const_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 = bool, via: @ ConstHasType(!const_0 , u32), assumptions: {@ ConstHasType(!const_0 , u32)}, env: Env { variables: [!const_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: @ ConstHasType(!const_0 , u32), assumptions: {@ ConstHasType(!const_0 , u32)}, env: Env { variables: [!const_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: bool, via: @ ConstHasType(!const_0 , u32), assumptions: {@ ConstHasType(!const_0 , u32)}, env: Env { variables: [!const_0], bias: Soundness, pending: [], allow_pending_outlives: false } }
crates/formality-rust/src/prove/prove/prove/prove_const_has_type.rs:11:1: no applicable rules for prove_const_has_type { constant: !const_0, assumptions: {@ ConstHasType(!const_0 , u32)}, env: Env { variables: [!const_0], bias: Soundness, pending: [], allow_pending_outlives: false }, decls: program([crate core { trait Copy <ty> { } impl Copy for () { } impl Copy for u8 { } impl Copy for u16 { } impl Copy for u32 { } impl Copy for u64 { } impl Copy for i8 { } impl Copy for i16 { } impl Copy for i32 { } impl Copy for i64 { } impl Copy for bool { } impl Copy for usize { } impl Copy for isize { } impl <lt, ty> Copy for &^lt0_0 ^ty0_1 { } trait Drop <ty> { } trait Derefable <ty> { type Target : [] ; } impl <lt, ty> Derefable for &^lt0_0 ^ty0_1 where ^ty0_1 : ^lt0_0 { type Target = ^ty1_1 ; } impl <lt, ty> Derefable for &mut ^lt0_0 ^ty0_1 where ^ty0_1 : ^lt0_0 { type Target = ^ty1_1 ; } }, crate Foo { trait Foo <ty, const> where type_of_const ^const0_1 is bool { } impl <const> Foo <^const0_0> for u32 where type_of_const ^const0_0 is u32 { } }], 222) }
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:178check_trait_impl failedimpls.rs:13rule "check_trait_impl"impls.rs:27prove 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:88prove_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:9rule "predicate-congruence-axiom"prove_via.rs:31prove failedprove_via.rs:31ruleprove_via.rs:31prove_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 "const has ty"prove_wc.rs:167prove_const_has_type failedprove_const_has_type.rs:11