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Positive coverage: borrow_check_statement / let-no-init

let-no-init
LineCoverageSource
2031(prove_ty_is_wf(env, assumptions, state, ty) => state)
204✗(let state = state.with_local_in_scope(&env.env, label, id, ty)?)
205N/A(let state = state.with_uninit(&PlaceExpr::Var(id.clone())))
──────── ("let-no-init")
2076(borrow_check_statement(env, assumptions, state, Stmt::Let { label, id, ty, init: None }, places_live_on_exit) => (env, state))

6 tests exercised this rule:

Source location: tests/borrowck.rs:290 (all coverage from this test)

fn foo() -> u32 {
    let x: u32;
    if true {
        x = 1_u32;
    } else {
        x = 2_u32;
    }
    return x;
}
Proof tree
… (200 of 3440 nodes shown)

Source location: tests/borrowck.rs:2575 (all coverage from this test)

fn foo() -> i32 {
    exists<'r0, 'r1> {
        let result: i32;
        {
            let v1: i32 = 22_i32;
            let v2: &'r0 i32 = &'r1 v1;
            result = *v2;
        }
        return result;
    }
}
Proof tree
… (200 of 3630 nodes shown)

Source location: tests/borrowck.rs:4467 (all coverage from this test)

fn to_refs<'a>(list: &'a mut List) -> &'a mut u32 {
    exists<'r0, 'r1> {
        let result: &'a mut u32;
        'l: loop {
            result = &'r0 mut (*list).value;
            if true {
                let n: &'r1 mut List = next_from_field::<'r1>(&'r1 mut (*list).next);
                list = n;
            } else {
                return result;
            }
        }
    }
}
Proof tree
… (200 of 4134 nodes shown)

Source location: tests/borrowck.rs:4502 (all coverage from this test)

fn to_refs2<'a>(list: &'a mut List) -> &'a mut u32 {
    exists<'r0, 'r1> {
        let result: &'a mut u32;
        'l: loop {
            result = &'r0 mut (*list).value;
            if true {
                let n: &'r1 mut List = next_from_field::<'r1>(&'r1 mut (*list).next);
                list = n;
            } else {
                break 'l;
            }
        }
        return result;
    }
}
Proof tree
… (200 of 4426 nodes shown)

Source location: tests/borrowck.rs:4549 (all coverage from this test)

fn to_refs3<'a>(list: &'a mut List) -> &'a mut u32 {
    exists<'r0, 'r1> {
        let result: &'a mut u32;
        let cursor: &'a mut List = &'a mut *list;
        'l: loop {
            result = &'r0 mut (*cursor).value;
            if true {
                let n: &'r1 mut List = next_from_field::<'r1>(&'r1 mut (*cursor).next);
                cursor = n;
            } else {
                return result;
            }
        }
    }
}
Proof tree
… (200 of 4289 nodes shown)

Source location: tests/mir_typeck.rs:276 (all coverage from this test)

fn foo() -> () {
    let s1: S1<u8>;
}
Proof tree
… (200 of 3413 nodes shown)

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