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Negative coverage: prove_ty_is_copy / trait / premise env.prove_goal(assumptions, &state, goal) => state

Premise at line 1033. Observed failure causes: failed_judgment.

trait
LineCoverageSource
1032N/A(let goal = AtomicPredicate::is_implemented(TraitId::new("Copy").with(ty, Vec::<Parameter>::new())))
10333(env.prove_goal(assumptions, &state, goal) => state)
──────── ("trait")
103520(prove_ty_is_copy(env, assumptions, state, ty) => state)

3 tests failed proving this premise:

Source location: tests/borrowck.rs:721 (all coverage from this test)

fn foo() -> Datum {
    exists<'r0, 'r1> {
        let x: Datum = Datum { value: 0_u32 };
        let r: &'r0 Datum = &'r1 x;
        let y: Datum = *r;
        return y;
    }
}
Failed proof tree
… (200 of 1420 nodes shown)

Source location: tests/borrowck.rs:1476 (all coverage from this test)

fn foo() -> Datum {
    exists<'r0, 'r1> {
        let x: Datum = Datum { value: 0_u32 };
        let r: &'r0 mut Datum = &'r1 mut x;
        let y: Datum = *r;
        return y;
    }
}
Failed proof tree
… (200 of 1420 nodes shown)

Source location: tests/borrowck.rs:3891 (all coverage from this test)

fn foo(f: Pair) -> () {
    let s: Datum = f.x;
}
Failed proof tree
… (200 of 332 nodes shown)

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