Test nonexistant_trait
Source location: tests/basic_tests.rs:466
#[test]
fn nonexistant_trait() {
FormalityTest::new(crates![crate core {
struct S {}
impl !Nonexistent for S {}
}])
.err(expect_test::expect![[r#"
the rule "check_neg_trait_impl" at (impls.rs) failed because
no trait named `Nonexistent`"#]]);
}Rules proved (0)
This test records no positive coverage.
Premises failed (4)
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.
| Judgment | Rule | Premise | All tests of this premise |
|---|---|---|---|
| check_neg_trait_impl | check_neg_trait_impl | let trait_decl = program.program().trait_named(&… (line 67) | 1 test |
| check_all_crates | check all prefixes | for_all(i in 0..crates.len()) (let program = cra… (line 51, blamed at line 53) | not counted by the judgment view |
| check_crate | check crate | for_all(item in &c.items) (check_crate_item(prog… (line 72, blamed at line 73) | not counted by the judgment view |
| check_crate_item | neg trait impl | check_neg_trait_impl(program, i) => () (line 212) | 3 tests |
Proof trees
Failed proof tree
check_all_crates failedmod.rs:41args
rule "check all prefixes"mod.rs:53check_crate failedmod.rs:60args
rule "check crate"mod.rs:73check_crate_item failedmod.rs:178args
rule "neg trait impl"mod.rs:212check_neg_trait_impl failedimpls.rs:47args
rule "check_neg_trait_impl"impls.rs:67 (failed: inapplicable)