Negative coverage: check_crate_item / free fn / premise check_free_fn(program, f, crate_id) => ()

Premise at line 207. Observed failure causes: failed_judgment.

81 tests failed proving this premise:

Source location: src/test_util.rs:464 (all coverage from this test)

#[test]
fn borrowck_err_checks_rustc_err_once() {
    let before = rustc_runs();
    FormalityTest::new(MOVED)
        .rustc_err(expect_test::expect![[r#"
            error[E0382]: use of moved value: `x`
             --> lib.rs
              |
            6 |     let mut x: Datum = Datum { value: 0_u32 };
              |         ----- move occurs because `x` has type `Datum`, which does not implement the `Copy` trait
            7 |     let mut y: Datum = x;
              |                        - value moved here
            8 |     let mut z: Datum = x;
              |                        ^ value used here after move
              |
            note: if `Datum` implemented `Clone`, you could clone the value
             --> lib.rs
              |
            1 | pub struct Datum {
              | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type
            ...
            7 |     let mut y: Datum = x;
              |                        - you could clone this value

            For more information about this error, try `rustc --explain E0382`.
            error: could not compile `Foo` (lib) due to 1 previous error
        "#]])
        .borrowck_err(BorrowCheckFailure::All, expect_test::expect![[r#"
            the rule "access_permitted" at (nll.rs) failed because
              condition evaluated to false: `match access.kind
              {
                  AccessKind::Write =>
                  check_place_writable(&state, &access.place.to_place_expression()),
                  AccessKind::Read | AccessKind::Move =>
                  check_place_initialized(&state, &access.place.to_place_expression()),
              }`"#]]);
    assert_eq!(rustc_runs() - before, 1);
}

Source location: src/test_util.rs:479 (all coverage from this test)

#[test]
#[should_panic(expected = "expected `rustc` to succeed but it failed")]
fn borrowck_err_enforces_rustc_ok() {
    FormalityTest::new(MOVED).rustc_ok().borrowck_err(
        BorrowCheckFailure::All,
        expect_test::expect![[r#"
            the rule "access_permitted" at (nll.rs) failed because
              condition evaluated to false: `match access.kind
              {
                  AccessKind::Write =>
                  check_place_writable(&state, &access.place.to_place_expression()),
                  AccessKind::Read | AccessKind::Move =>
                  check_place_initialized(&state, &access.place.to_place_expression()),
              }`"#]],
    );
}

Source location: src/test_util.rs:516 (all coverage from this test)

#[test]
fn rustc_expectation_is_independent_of_borrowck_modes() {
    let before = rustc_runs();
    FormalityTest::new(NLL_ONLY_ERROR)
        .rustc_err(expect_test::expect![[r#"
            error[E0499]: cannot borrow `*m` as mutable more than once at a time
             --> lib.rs
              |
            3 | pub fn foo<'a00>(mut m: &'a00 mut Map) -> &'a00 mut Map {
              |            ---- lifetime `'a00` defined here
            4 |     {
            5 |         let mut n: &'_ mut Map = &mut *m;
              |                                  ------- first mutable borrow occurs here
            6 |         if false {
            7 |             return n;
              |                    - returning this value requires that `*m` is borrowed for `'a00`
            8 |         } else {
            9 |             let mut o: &'_ mut Map = &mut *m;
              |                                      ^^^^^^^ second mutable borrow occurs here

            For more information about this error, try `rustc --explain E0499`.
            error: could not compile `Foo` (lib) due to 1 previous error
        "#]])
        .borrowck_err(BorrowCheckFailure::Nll, expect_test::expect![[r#"
            the rule "borrow of disjoint places" at (nll.rs) failed because
              condition evaluated to false: `place_disjoint_from_place(&loan.place, &access.place)`
                &loan.place = *(m : &!lt_1 mut Map) : <&!lt_1 mut Map as Derefable>::Target
                &access.place = *(m : &!lt_1 mut Map) : <&!lt_1 mut Map as Derefable>::Target

            the rule "loan_cannot_outlive" at (nll.rs) failed because
              condition evaluated to false: `!outlived_by_loan.contains(&lifetime.upcast())`
                outlived_by_loan = {!lt_1, ?lt_2, ?lt_3}
                &lifetime.upcast() = !lt_1

            the rule "loan_not_required_by_universal_regions" at (nll.rs) failed because
              condition evaluated to false: `outlived_by_loan.iter().all(|p| match p
              {
                  Parameter::Ty(_) => false, Parameter::Lt(lt) => match lt.as_ref()
                  {
                      Lt::Static => false, Lt::Variable(Variable::UniversalVar(_)) => false,
                      Lt::Variable(Variable::ExistentialVar(_)) => true,
                      Lt::Variable(Variable::BoundVar(_)) =>
                      panic!("cannot outlive a bound var"), Lt::Erased => true,
                  }, Parameter::Const(_) => panic!("cannot outlive a constant"),
              })`

            the rule "write-indirect" at (nll.rs) failed because
              pattern `TypedPlaceExpressionData::Deref(place_loaned_ref)` did not match value `m`

            the rule "write-indirect" at (nll.rs) failed because
              condition evaluated to false: `place_accessed.is_prefix_of(place_loaned_ref)`
                place_accessed = *(m : &!lt_1 mut Map) : <&!lt_1 mut Map as Derefable>::Target
                place_loaned_ref = m : &!lt_1 mut Map"#]]);
    assert_eq!(rustc_runs() - before, 1);
}

Source location: tests/borrowck.rs:124 (all coverage from this test)

fn foo() -> u32 {
    let x: u32;
    return x;
}

Source location: tests/borrowck.rs:172 (all coverage from this test)

fn foo() -> Datum {
    let x: Datum = Datum { value: 0_u32 };
    let y: Datum = x;
    let z: Datum = x;
    return z;
}

Source location: tests/borrowck.rs:240 (all coverage from this test)

fn foo() -> u32 {
    let x: u32;
    if true {
        x = 1_u32;
    } else {
    }
    return x;
}

Source location: tests/borrowck.rs:342 (all coverage from this test)

fn foo() -> u32 {
    let x: u32;
    if true {
        x = 1_u32;
    }
    return x;
}

Source location: tests/borrowck.rs:393 (all coverage from this test)

fn foo() -> Datum {
    let x: Datum = Datum { value: 0_u32 };
    if true {
        let y: Datum = x;
    }
    let z: Datum = x;
    return z;
}

Source location: tests/borrowck.rs:446 (all coverage from this test)

fn foo() -> u32 {
    let x: Pair;
    x.first = 1_u32;
    return 0_u32;
}

Source location: tests/borrowck.rs:532 (all coverage from this test)

fn foo() -> u32 {
    let x: Pair = Pair {
        first: Datum { value: 1_u32 },
        second: Datum { value: 2_u32 },
    };
    let a: Datum = x.first;
    let b: Pair = x;
    return 0_u32;
}

Source location: tests/borrowck.rs:580 (all coverage from this test)

fn foo() -> Datum {
    let x: Pair = Pair {
        first: Datum { value: 1_u32 },
        second: Datum { value: 2_u32 },
    };
    let a: Datum = x.first;
    let b: Datum = x.first;
    return b;
}

Proof trees omitted for the remaining 71 tests; each one is on its test’s page in Coverage by test.

Source location: tests/borrowck.rs:628 (all coverage from this test)

fn foo() -> Datum {
    let x: Pair = Pair {
        first: Datum { value: 1_u32 },
        second: Datum { value: 2_u32 },
    };
    let a: Pair = x;
    let b: Datum = x.first;
    return b;
}

Source location: tests/borrowck.rs:672 (all coverage from this test)

fn foo() -> u32 {
    let x: Outer = Outer {
        foo: Inner { bar: 1_u32 },
    };
    let a: Inner = x.foo;
    let b: u32 = x.foo.bar;
    return b;
}

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;
    }
}

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;
    }
}

Source location: tests/borrowck.rs:2232 (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 = x;
        return *r;
    }
}

Source location: tests/borrowck.rs:2301 (all coverage from this test)

fn foo() -> u32 {
    let x: u32;
    return x;
}

Source location: tests/borrowck.rs:2347 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let v1: i32 = 0_i32;
        let v2: &'r0 mut i32 = &'r1 mut v1;
        // This should result in an error
        v1 = 1_i32;
        return *v2;
    }
}

Source location: tests/borrowck.rs:2385 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let v1: i32 = 0_i32;
        let v2: &'r0 i32 = &'r1 v1;
        v1 = 1_i32;
        return *v2;
    }
}

Source location: tests/borrowck.rs:2419 (all coverage from this test)

fn foo() -> i32 {
    exists<'r> {
        let v3: i32 = 0_i32;
        let v4: &'r i32 = &'r v3;
    }
    exists<'r0, 'r1> {
        let v1: i32 = 0_i32;
        let v2: &'r0 i32 = &'r1 v1;
        v1 = 1_i32;
        return *v2;
    }
}

Source location: tests/borrowck.rs:2470 (all coverage from this test)

fn min_problem_case_3<'a>(m: &'a mut Map) -> &'a mut Map {
    exists<'r0, 'r1> {
        let n: &'r0 mut Map = &'r0 mut *m;
        if true {
            return n;
        } else {
            let o: &'r1 mut Map = &'r1 mut *m;
            return o;
        }
    }
}

Source location: tests/borrowck.rs:2531 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let v2: &'r0 i32;
        {
            let v1: i32 = 0_i32;
            v2 = &'r1 v1;
        }
        return *v2;
    }
}

Source location: tests/borrowck.rs:2603 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let v2: &'r0 mut i32;
        {
            let v1: i32 = 0_i32;
            v2 = &'r1 mut v1;
        }
        return *v2;
    }
}

Source location: tests/borrowck.rs:2645 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let v2: &'r0 i32;
        'a: {
            let v1: i32 = 0_i32;
            v2 = &'r1 v1;
            break 'a;
        }
        return *v2;
    }
}

Source location: tests/borrowck.rs:2704 (all coverage from this test)

fn foo<'a, 'b>(v1: &'a u32) -> &'b u32 {
    exists<'r0> {
        let v2: &'r0 u32 = v1;
        return v2;
    }
}

Source location: tests/borrowck.rs:2734 (all coverage from this test)

fn foo<'a, 'b>(v1: &'a u32, v2: &'b u32) -> () {
    let output: &'b u32 = v2;
    loop {
        output = v1;
    }
}

Source location: tests/borrowck.rs:2799 (all coverage from this test)

fn foo<'a, 'b, 'c>(v1: &'a u32) -> &'c u32
where
    'a: 'b,
{
    return v1;
}

Source location: tests/borrowck.rs:2983 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let r: &'r0 i32;
        'a: loop {
            let y: i32 = 0_i32;
            r = &'r1 y;
            continue 'a;
        }
        r; // only an error because of false edges, assumption that all loops terminate
    }
}

Source location: tests/borrowck.rs:3030 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let x: i32 = 0_i32;
        let r: &'r0 i32;
        'a: loop {
            r; // this *may* read from `y` in a previous iteration
            let y: i32 = 0_i32;
            r = &'r1 y;
            continue 'a;
        }
    }
}

Source location: tests/borrowck.rs:3100 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let r: &'r0 i32;
        'a: loop {
            let x: i32 = 0_i32;
            r = &'r1 x;
            break 'a;
        }
        return *r;
    }
}

Source location: tests/borrowck.rs:3227 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1> {
        let a: u32 = 22_u32;
        let p: &'r0 u32 = &'r1 a;
        'l: loop {
            if true {
                a = 23_u32;
                continue 'l;
            } else {
                break 'l;
            }
        }
        return *p;
    }
}

Source location: tests/borrowck.rs:3288 (all coverage from this test)

fn foo<'a>(m: &'a mut Map) -> &'a mut Map {
    exists<'r0, 'r1> {
        let n: &'r0 mut Map = &'r0 mut *m;
        if false {
            return n;
        } else {
            let o: &'r1 mut Map = &'r1 mut *m;
            return o;
        }
    }
}

Source location: tests/borrowck.rs:3352 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1, 'r2> {
        let a: u32 = 22_u32;
        let b: u32 = 22_u32;
        let p: &'r0 u32 = &'r1 a;
        a = 23_u32;
        'l: loop {
            p = &'r2 b;
            break 'l;
        }
        return *p;
    }
}

Source location: tests/borrowck.rs:3470 (all coverage from this test)

fn foo<'a, 'b>(a: &'a u32) -> &'b u32 {
    let r: &'b u32 = identity::<&'b u32>(a);
    return r;
}

Source location: tests/borrowck.rs:3536 (all coverage from this test)

fn bar() -> u32 {
    exists<'r0, 'r1, 'r2> {
        let v: u32 = 0_u32;
        let p: &'r0 u32 = &'r1 v;
        let _: u32 = foo::<'r2>(&'r2 mut v);
        return *p;
    }
}

Source location: tests/borrowck.rs:3584 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1> {
        let p: Point = Point { x: 0_u32, y: 0_u32 };
        let b1: &'r0 mut u32 = &'r1 mut p.x;
        p.x = 1_u32;
        return *b1;
    }
}

Source location: tests/borrowck.rs:3618 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1> {
        let v1: u32 = 22_u32;
        let v2: &'r0 mut u32 = &'r1 mut v1;
        let w: Wrapper = Wrapper { value: v1 };
        return *v2;
    }
}

Source location: tests/borrowck.rs:3658 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0> {
        let v1: u32 = 0_u32;
        let w: Wrapper<'r0> = Wrapper::<'r0> { value: &'r0 mut v1 };
        v1 = 1_u32;
        return *(w.value);
    }
}

Source location: tests/borrowck.rs:3715 (all coverage from this test)

fn reborrow<'a>(a: &'a mut u8) -> &'a mut u8 {
    exists<'r0, 'r1, 'r2, 'r3> {
        // This creates an outlives constraint
        let b: &'r1 mut u8 = &'r0 mut *a;
        if true {
            return b;
        } else {
            // this means the loan remains live
        }

        // If the outlives constraint propagated here,
        // we would get an error.
        let c: &'r3 mut u8 = &'r2 mut *a;
        return c;
    }
}

Source location: tests/borrowck.rs:3813 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1, 'r2> {
        let x: u32 = 22_u32;
        let p: &'r1 u32 = &'r0 x;
        let q: &'r2 u32 = p;
        x = 1_u32;
        q;
        return 0_u32;
    }
}

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

fn foo(f: Pair) -> () {
    let s: Datum = f.x;
}

Source location: tests/borrowck.rs:4007 (all coverage from this test)

fn foo() -> u32 {
    exists<'r0, 'r1> {
        let x: u32 = 22_u32;
        let helper: &'r1 u32 = &'r0 x;
        x = 1_u32;
        helper;
        return 0_u32;
    }
}

Source location: tests/borrowck.rs:4035 (all coverage from this test)

fn foo<'a, 'b>(p: &'a mut u32) -> u32 {
    let q: &'b mut u32 = &'b mut *p;
    q;
    return 0_u32;
}

Source location: tests/borrowck.rs:4214 (all coverage from this test)

fn remove_last_node_iterative<'a>(node: &'a mut List) -> u32 {
    exists<'r0, 'r1> {
        let cursor: &'r0 mut List = &'r0 mut *node;
        'l: loop {
            let next: &'r1 mut List = &'r1 mut *cursor;
            if true {
                cursor = next;
            } else {
                break 'l;
            }
        }
        *cursor = List { value: 0_u32 };
        return 0_u32;
    }
}

Source location: tests/borrowck.rs:4326 (all coverage from this test)

fn conditional() -> u32 {
    exists<'r0, 'r1, 'r2, 'r3> {
        let b: X = X { value: 0_u32 };
        let p: &'r0 mut X = &'r1 mut b;
        'l: loop {
            let now: &'r2 mut X = &'r2 mut *p;
            if true {
                if true {
                    let next: &'r3 mut X = next_of::<'r3>(&'r3 mut *now);
                    p = next;
                } else {
                }
            } else {
                break 'l;
            }
        }
        return 0_u32;
    }
}

Source location: tests/borrowck.rs:4592 (all coverage from this test)

fn next<'a>(d: &'a mut Decoder) -> &'a u32 {
    exists<'r0, 'r1> {
        'l: loop {
            let buf: &'r0 u32 = fill_buf::<'r0>(&'r0 mut (*d).buf_read);
            let s: &'r1 u32 = decode::<'r1>(buf);
            if true {
                return s;
            } else {
            }
        }
    }
}

Source location: tests/borrowck.rs:4715 (all coverage from this test)

fn next<'s>(f: &'s mut Filter) -> &'s mut u32 {
    exists<'r0, 'r1, 'r2> {
        'l: loop {
            let item: &'r0 mut u32 = iter_next::<'r0>(&'r0 mut (*f).iter);
            if true {
                let keep: bool = call_predicate::<'r1, 'r2>(&'r1 mut (*f).predicate, &'r2 *item);
                if keep {
                    return item;
                } else {
                }
            } else {
                break 'l;
            }
        }
        return no_item::<'s>();
    }
}

Source location: tests/borrowck.rs:4831 (all coverage from this test)

fn use_it<'a, 'b>() -> u32 {
    exists<'r0> {
        let v: Invariant<'r0> = create_invariant::<'r0>();
        if true {
            return sink::<'a, 'r0>(v);
        } else {
            return sink::<'b, 'r0>(v);
        }
    }
}

Source location: tests/borrowck.rs:4862 (all coverage from this test)

fn use_both<'a, 'b>() -> u32 {
    exists<'r0> {
        let v: Invariant<'r0> = create_invariant::<'r0>();
        let w: Invariant<'r0> = create_invariant::<'r0>();
        sink::<'a, 'r0>(v);
        sink::<'b, 'r0>(w);
        return 0_u32;
    }
}

Source location: tests/borrowck.rs:5052 (all coverage from this test)

fn foo() -> () {
    let x: u32 = 1_u32;
    exists<'r0> {
        let r: &'r0 u32 = &'r0 x;
        x += 1_u32;
        let y: u32 = *r;
    }
}

Source location: tests/borrowck.rs:5096 (all coverage from this test)

fn foo() -> () {
    let x: u32;
    x += 1_u32;
}

Source location: tests/borrowck.rs:5149 (all coverage from this test)

fn foo() -> () {
    let x: u32 = 1_u32;
    exists<'a> {
        let r: &'a mut u32 = &'a mut x;
        x = x + *r;
    }
}

Source location: tests/borrowck.rs:5201 (all coverage from this test)

fn foo() -> () {
    let x: u32 = 1_u32;
    exists<'a> {
        let r: &'a mut u32 = &'a mut x;
        x += *r;
        let y: u32 = *r;
    }
}

Source location: tests/borrowck.rs:5253 (all coverage from this test)

fn foo() -> () {
    let x: u32 = 1_u32;
    exists<'a> {
        let r: &'a mut u32 = &'a mut x;
        *r += x;
    }
}

Source location: tests/consts.rs:149 (all coverage from this test)

Source location: tests/mir_typeck.rs:168 (all coverage from this test)

fn foo (b: bool) -> u32 {
    if b {
        return 1_u32;
    } else {
        return false;
    }
}

Source location: tests/mir_typeck.rs:321 (all coverage from this test)

fn foo() -> () {
    let s2: S2<S1>;
}

Source location: tests/mir_typeck.rs:345 (all coverage from this test)

fn bar() -> u32 {
    let v1: u32 = foo(0_u32);
    return v1;
}

Source location: tests/mir_typeck.rs:392 (all coverage from this test)

fn bar(v1: ()) -> () {
    let v0: () = foo(v1);
    return v0;
}

Source location: tests/mir_typeck.rs:416 (all coverage from this test)

fn bar(v1: u32) -> u32 {
    let v0: u32 = identity(v1);
    return v0;
}

Source location: tests/mir_typeck.rs:488 (all coverage from this test)

fn bar(v1: u32) -> u32 {
    let v0: u32 = identity::<bool>(v1);
    return v0;
}

Source location: tests/mir_typeck.rs:532 (all coverage from this test)

fn bar(v1: u32) -> u32 {
    let v0: u32 = identity::<u32>(v1, v1);
    return v0;
}

Source location: tests/mir_typeck.rs:568 (all coverage from this test)

fn bar(v1: u32) -> u32 {
    let v0: u32 = identity::<u32, u32>(v1);
    return v0;
}

Source location: tests/mir_typeck.rs:601 (all coverage from this test)

fn foo (v1: ()) -> u32 {
    return v1;
}

Source location: tests/mir_typeck.rs:791 (all coverage from this test)

fn foo (v1: u32) -> u32 {
    let v2: Dummy = Dummy { value: 1_u32 };
    v2.nonexistent = 2_u32;
    return v1;
}

Source location: tests/mir_typeck.rs:820 (all coverage from this test)

fn foo (v1: u32) -> u32 {
    let v2: Dummy = Dummy { value: 1_u32 };
    v1.value = 2_u32;
    return v1;
}

Source location: tests/mir_typeck.rs:848 (all coverage from this test)

fn foo (v1: u32) -> u32 {
    let v2: Dummy = Dummy { value: false };
    return v1;
}

Source location: tests/mir_typeck.rs:876 (all coverage from this test)

fn foo (v1: u32) -> u32 {
    let v2: u32 = Nonexistent { value: false };
    return v1;
}

Source location: tests/mir_typeck.rs:902 (all coverage from this test)

fn main() -> () {
    let s: S = S { x: 1_u32, x: 2_u32 };
}

Source location: tests/mir_typeck.rs:1046 (all coverage from this test)

fn foo() -> u32 {
    loop {
        break 'nonexistent;
    }
    return 0_u32;
}

Source location: tests/mir_typeck.rs:1109 (all coverage from this test)

fn foo() -> u32 {
    'a: {
        continue 'a;
    }
    return 0_u32;
}

Source location: tests/mir_typeck.rs:1218 (all coverage from this test)

fn foo() -> () {
    let x: i32 = 1_i32 + 2_u32;
}

Source location: tests/mir_typeck.rs:1270 (all coverage from this test)

fn foo() -> () {
    let x: i32 = 10_i32 - 3_u32;
}

Source location: tests/mir_typeck.rs:1323 (all coverage from this test)

fn foo() -> () {
    let x: i32 = 3_i32 * 4_u32;
}

Source location: tests/mir_typeck.rs:1349 (all coverage from this test)

fn foo() -> () {
    let x: bool = true * false;
}

Source location: tests/mir_typeck.rs:1394 (all coverage from this test)

fn main() -> () { require_marker::<S>; }
}])
tc_err(expect_test::expect![[r#"
error[E0277]: the trait bound `S: Marker` is not satisfied
  --> lib.rs
   |
13 |     require_marker::<S>;
   |                      ^ unsatisfied trait bound
   |
help: the trait `Marker` is not implemented for `S`
  --> lib.rs
   |
 3 | pub struct S {}
   | ^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
  --> lib.rs
   |
 1 | pub trait Marker {}
   | ^^^^^^^^^^^^^^^^
note: required by a bound in `require_marker`
  --> lib.rs
   |
 5 | pub fn require_marker<T00>() -> ()
   |        -------------- required by a bound in this function
 6 | where
 7 |     T00: Marker,
   |          ^^^^^^ required by this bound in `require_marker`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `test` (lib) due to 1 previous error
)
(expect_test::expect![[r#"
the rule "trait implied bound" at (prove_predicate.rs) failed because
  expression evaluated to an empty collection: `decls.trait_invariants()`"#]]);
}

ing the same function is still rejected. The where-clauses are now
ked both for the function name and by the call.
#[test]
generic_fn_call_with_unsatisfied_where_clause() {
alityTest::new(crates![crate test {
trait Marker {}
struct S {}
fn require_marker<T>() -> () where T: Marker { trusted }
fn main() -> () { require_marker::<S>(); }
}])
tc_err(expect_test::expect![[r#"
error[E0277]: the trait bound `S: Marker` is not satisfied
  --> lib.rs
   |
13 |     require_marker::<S>();
   |                      ^ unsatisfied trait bound
   |
help: the trait `Marker` is not implemented for `S`
  --> lib.rs
   |
 3 | pub struct S {}
   | ^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
  --> lib.rs
   |
 1 | pub trait Marker {}
   | ^^^^^^^^^^^^^^^^
note: required by a bound in `require_marker`
  --> lib.rs
   |
 5 | pub fn require_marker<T00>() -> ()
   |        -------------- required by a bound in this function
 6 | where
 7 |     T00: Marker,
   |          ^^^^^^ required by this bound in `require_marker`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `test` (lib) due to 1 previous error
)
(expect_test::expect![[r#"
the rule "trait implied bound" at (prove_predicate.rs) failed because
  expression evaluated to an empty collection: `decls.trait_invariants()`"#]]);
}

ng the function with a type that implements `Marker` is accepted.
#[test]
generic_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate test {
trait Marker {}
impl Marker for u32 {}
fn require_marker<T>() -> () where T: Marker {}
fn main() -> () { require_marker::<u32>; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_trait_bound() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require<T>() -> () where T: Marker {}
fn outer<T>() -> () where T: Marker { require::<T>; }
fn main() -> () { outer::<u32>(); }
}])
tc_ok()
);
}

#[test]
bare_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require() -> () where u32: Marker {}
fn main() -> () { require; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () where 'a: 'b { require::<'a, 'b>; }
fn main() -> () { outer::<'static, 'static>(); }
}])
tc_ok()
);
}

#[test]
fn_value_with_unsatisfied_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () { require::<'a, 'b>; }
fn main() -> () {}
}])
tc_err(expect_test::expect![[r#"
error: lifetime may not live long enough
 --> lib.rs
  |
7 | pub fn outer<'a00, 'a01>() -> () {
  |              ----  ---- lifetime `'a01` defined here
  |              |
  |              lifetime `'a00` defined here
8 |     require::<'a00, 'a01>;
  |     ^^^^^^^^^^^^^^^^^^^^^ requires that `'a00` must outlive `'a01`
  |
  = help: consider adding the following bound: `'a00: 'a01`

error: could not compile `Foo` (lib) due to 1 previous error
)
(expect_test::expect!["crates/formality-rust/src/prove/prove_outlives.rs:8:1: no applicable rules for prove_outlives { a: !lt_0, b: !lt_1, assumptions: {}, env: Env { variables: [!lt_0, !lt_1], bias: Soundness, pending: [], allow_pending_outlives: false } }"]);
}

ound assignment of an integer of a different type should fail.
#[test]
compound_add_mismatched_int_types() {
alityTest::new(crates![crate Foo {
fn foo() -> () {
    let x: u32 = 1_u32;
    x += 2_u8;
}

Source location: tests/mir_typeck.rs:1438 (all coverage from this test)

fn main() -> () { require_marker::<S>(); }
}])
tc_err(expect_test::expect![[r#"
error[E0277]: the trait bound `S: Marker` is not satisfied
  --> lib.rs
   |
13 |     require_marker::<S>();
   |                      ^ unsatisfied trait bound
   |
help: the trait `Marker` is not implemented for `S`
  --> lib.rs
   |
 3 | pub struct S {}
   | ^^^^^^^^^^^^
help: this trait has no implementations, consider adding one
  --> lib.rs
   |
 1 | pub trait Marker {}
   | ^^^^^^^^^^^^^^^^
note: required by a bound in `require_marker`
  --> lib.rs
   |
 5 | pub fn require_marker<T00>() -> ()
   |        -------------- required by a bound in this function
 6 | where
 7 |     T00: Marker,
   |          ^^^^^^ required by this bound in `require_marker`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `test` (lib) due to 1 previous error
)
(expect_test::expect![[r#"
the rule "trait implied bound" at (prove_predicate.rs) failed because
  expression evaluated to an empty collection: `decls.trait_invariants()`"#]]);
}

ng the function with a type that implements `Marker` is accepted.
#[test]
generic_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate test {
trait Marker {}
impl Marker for u32 {}
fn require_marker<T>() -> () where T: Marker {}
fn main() -> () { require_marker::<u32>; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_trait_bound() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require<T>() -> () where T: Marker {}
fn outer<T>() -> () where T: Marker { require::<T>; }
fn main() -> () { outer::<u32>(); }
}])
tc_ok()
);
}

#[test]
bare_fn_value_with_satisfied_where_clause() {
alityTest::new(crates![crate Foo {
trait Marker {}
impl Marker for u32 {}
fn require() -> () where u32: Marker {}
fn main() -> () { require; }
}])
tc_ok()
);
}

#[test]
fn_value_with_forwarded_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () where 'a: 'b { require::<'a, 'b>; }
fn main() -> () { outer::<'static, 'static>(); }
}])
tc_ok()
);
}

#[test]
fn_value_with_unsatisfied_lifetime_bound() {
alityTest::new(crates![crate Foo {
fn require<'a, 'b>() -> () where 'a: 'b {}
fn outer<'a, 'b>() -> () { require::<'a, 'b>; }
fn main() -> () {}
}])
tc_err(expect_test::expect![[r#"
error: lifetime may not live long enough
 --> lib.rs
  |
7 | pub fn outer<'a00, 'a01>() -> () {
  |              ----  ---- lifetime `'a01` defined here
  |              |
  |              lifetime `'a00` defined here
8 |     require::<'a00, 'a01>;
  |     ^^^^^^^^^^^^^^^^^^^^^ requires that `'a00` must outlive `'a01`
  |
  = help: consider adding the following bound: `'a00: 'a01`

error: could not compile `Foo` (lib) due to 1 previous error
)
(expect_test::expect!["crates/formality-rust/src/prove/prove_outlives.rs:8:1: no applicable rules for prove_outlives { a: !lt_0, b: !lt_1, assumptions: {}, env: Env { variables: [!lt_0, !lt_1], bias: Soundness, pending: [], allow_pending_outlives: false } }"]);
}

ound assignment of an integer of a different type should fail.
#[test]
compound_add_mismatched_int_types() {
alityTest::new(crates![crate Foo {
fn foo() -> () {
    let x: u32 = 1_u32;
    x += 2_u8;
}

Source location: tests/mir_typeck.rs:1514 (all coverage from this test)

fn main() -> () {}
}])
tc_err(expect_test::expect![[r#"
error: lifetime may not live long enough
 --> lib.rs
  |
7 | pub fn outer<'a00, 'a01>() -> () {
  |              ----  ---- lifetime `'a01` defined here
  |              |
  |              lifetime `'a00` defined here
8 |     require::<'a00, 'a01>;
  |     ^^^^^^^^^^^^^^^^^^^^^ requires that `'a00` must outlive `'a01`
  |
  = help: consider adding the following bound: `'a00: 'a01`

error: could not compile `Foo` (lib) due to 1 previous error
)
(expect_test::expect!["crates/formality-rust/src/prove/prove_outlives.rs:8:1: no applicable rules for prove_outlives { a: !lt_0, b: !lt_1, assumptions: {}, env: Env { variables: [!lt_0, !lt_1], bias: Soundness, pending: [], allow_pending_outlives: false } }"]);
}

ound assignment of an integer of a different type should fail.
#[test]
compound_add_mismatched_int_types() {
alityTest::new(crates![crate Foo {
fn foo() -> () {
    let x: u32 = 1_u32;
    x += 2_u8;
}

Source location: tests/mir_typeck.rs:1559 (all coverage from this test)

fn foo() -> () {
    let x: u32 = 1_u32;
    x += 2_u8;
}

Source location: tests/mir_typeck.rs:1586 (all coverage from this test)

fn foo() -> () {
    let x: bool = true;
    x += false;
}

Source location: tests/references.rs:13 (all coverage from this test)

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