Negative coverage: borrow_check_statement / exists / premise borrow_check_block(env, assumptions_body, state, block, places_live_on_exit) => state

Premise at line 311. Observed failure causes: failed_judgment.

23 tests failed proving this premise:

Source location: tests/borrowck.rs:638 (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:1297 (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:1957 (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:2072 (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:2110 (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:2219 (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:2291 (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:2333 (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:2392 (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:2655 (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:2702 (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;
        }
    }
}

Proof trees omitted for the remaining 13 tests; each one is on its test’s page in Coverage by test.

Source location: tests/borrowck.rs:2772 (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:2899 (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:3024 (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:3208 (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:3256 (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:3290 (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:3330 (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:3484 (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:3648 (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:3855 (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:3967 (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:4503 (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;
    }
}