// MIR for `f` after built

fn f() -> () {
    let mut _0: ();
    let mut _1: !;
    let _2: std::string::String;
    let _6: ();
    let mut _7: std::string::String;
    scope 1 {
        debug _a => _2;
        let _3: i32;
        scope 2 {
            debug _b => _3;
            let _4: std::string::String;
            scope 3 {
                debug _c => _4;
                let _5: std::string::String;
                scope 4 {
                    debug _d => _5;
                }
            }
        }
    }

    bb0: {
        StorageLive(_2);
        _2 = String::new() -> [return: bb1, unwind: bb17];
    }

    bb1: {
        FakeRead(ForLet(None), _2);
        StorageLive(_3);
        _3 = const 12_i32;
        FakeRead(ForLet(None), _3);
        StorageLive(_4);
        _4 = String::new() -> [return: bb2, unwind: bb16];
    }

    bb2: {
        FakeRead(ForLet(None), _4);
        StorageLive(_5);
        _5 = String::new() -> [return: bb3, unwind: bb15];
    }

    bb3: {
        FakeRead(ForLet(None), _5);
        StorageLive(_6);
        StorageLive(_7);
        _7 = move _4;
        _6 = std::mem::drop::<String>(move _7) -> [return: bb4, unwind: bb13];
    }

    bb4: {
        StorageDead(_7);
        StorageDead(_6);
        drop(_5) -> [return: bb5, unwind: bb15];
    }

    bb5: {
        StorageDead(_5);
        drop(_4) -> [return: bb6, unwind: bb16];
    }

    bb6: {
        StorageDead(_4);
        StorageDead(_3);
        drop(_2) -> [return: bb7, unwind: bb17];
    }

    bb7: {
        StorageDead(_2);
        tailcall g();
    }

    bb8: {
        drop(_5) -> [return: bb9, unwind: bb15];
    }

    bb9: {
        StorageDead(_5);
        drop(_4) -> [return: bb10, unwind: bb16];
    }

    bb10: {
        StorageDead(_4);
        StorageDead(_3);
        drop(_2) -> [return: bb11, unwind: bb17];
    }

    bb11: {
        StorageDead(_2);
        unreachable;
    }

    bb12: {
        return;
    }

    bb13 (cleanup): {
        drop(_7) -> [return: bb14, unwind terminate(cleanup)];
    }

    bb14 (cleanup): {
        drop(_5) -> [return: bb15, unwind terminate(cleanup)];
    }

    bb15 (cleanup): {
        drop(_4) -> [return: bb16, unwind terminate(cleanup)];
    }

    bb16 (cleanup): {
        drop(_2) -> [return: bb17, unwind terminate(cleanup)];
    }

    bb17 (cleanup): {
        resume;
    }
}