Negative coverage: borrow_check_expr_has_ty / block / premise borrow_check_expr(env, assumptions, state, expr, places_live_on_exit) => (ty_expr, state)

Premise at line 364. Observed failure causes: failed_judgment.

28 tests failed proving this premise:

Source location: tests/borrowck.rs:89 (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:310 (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:449 (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:497 (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;
}

Source location: tests/borrowck.rs:545 (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:589 (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: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:2158 (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:2960 (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;
        }
    }
}

Proof trees omitted for the remaining 18 tests; each one is on its test’s page in Coverage by test.

Source location: tests/borrowck.rs:3142 (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: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: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:3387 (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:3544 (all coverage from this test)

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

Source location: tests/borrowck.rs:3676 (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: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:4233 (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:4356 (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/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: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;
}