// MIR for `range_loop` after PreCodegen

fn range_loop(_1: &[T], _2: impl Fn(usize, &T)) -> () {
    debug slice => _1;
    debug f => _2;
    let mut _0: ();
    let mut _3: usize;
    let mut _4: std::ops::Range<usize>;
    let mut _5: std::ops::Range<usize>;
    let mut _6: &mut std::ops::Range<usize>;
    let mut _14: std::option::Option<usize>;
    let mut _16: usize;
    let mut _17: bool;
    let mut _19: &impl Fn(usize, &T);
    let mut _20: (usize, &T);
    let _21: ();
    scope 1 {
        debug iter => _5;
        let _15: usize;
        scope 2 {
            debug i => _15;
            let _18: &T;
            scope 3 {
                debug x => _18;
            }
        }
        scope 5 (inlined iter::range::<impl Iterator for std::ops::Range<usize>>::next) {
            debug self => _6;
            scope 6 (inlined <std::ops::Range<usize> as iter::range::RangeIteratorImpl>::spec_next) {
                debug self => _6;
                let mut _7: &usize;
                let mut _8: &usize;
                let mut _11: bool;
                let _12: usize;
                let mut _13: usize;
                scope 7 {
                    debug old => _12;
                    scope 8 {
                    }
                }
                scope 9 (inlined std::cmp::impls::<impl PartialOrd for usize>::lt) {
                    debug self => _7;
                    debug other => _8;
                    let mut _9: usize;
                    let mut _10: usize;
                }
            }
        }
    }
    scope 4 (inlined <std::ops::Range<usize> as IntoIterator>::into_iter) {
        debug self => _4;
    }

    bb0: {
        StorageLive(_3);
        _3 = Len((*_1));
        _4 = std::ops::Range::<usize> { start: const 0_usize, end: move _3 };
        StorageDead(_3);
        StorageLive(_5);
        _5 = _4;
        goto -> bb1;
    }

    bb1: {
        StorageLive(_14);
        _6 = &mut _5;
        StorageLive(_12);
        StorageLive(_11);
        StorageLive(_7);
        _7 = &(_5.0: usize);
        StorageLive(_8);
        _8 = &(_5.1: usize);
        StorageLive(_9);
        _9 = (_5.0: usize);
        StorageLive(_10);
        _10 = (_5.1: usize);
        _11 = Lt(move _9, move _10);
        StorageDead(_10);
        StorageDead(_9);
        switchInt(move _11) -> [0: bb2, otherwise: bb4];
    }

    bb2: {
        StorageDead(_8);
        StorageDead(_7);
        StorageDead(_11);
        StorageDead(_12);
        StorageDead(_14);
        StorageDead(_5);
        drop(_2) -> [return: bb3, unwind unreachable];
    }

    bb3: {
        return;
    }

    bb4: {
        StorageDead(_8);
        StorageDead(_7);
        _12 = (_5.0: usize);
        StorageLive(_13);
        _13 = <usize as Step>::forward_unchecked(_12, const 1_usize) -> [return: bb5, unwind unreachable];
    }

    bb5: {
        (_5.0: usize) = move _13;
        StorageDead(_13);
        _14 = Option::<usize>::Some(_12);
        StorageDead(_11);
        StorageDead(_12);
        _15 = ((_14 as Some).0: usize);
        _16 = Len((*_1));
        _17 = Lt(_15, _16);
        assert(move _17, "index out of bounds: the length is {} but the index is {}", move _16, _15) -> [success: bb6, unwind unreachable];
    }

    bb6: {
        _18 = &(*_1)[_15];
        StorageLive(_19);
        _19 = &_2;
        StorageLive(_20);
        _20 = (_15, _18);
        _21 = <impl Fn(usize, &T) as Fn<(usize, &T)>>::call(move _19, move _20) -> [return: bb7, unwind unreachable];
    }

    bb7: {
        StorageDead(_20);
        StorageDead(_19);
        StorageDead(_14);
        goto -> bb1;
    }
}