// MIR for `slice_iter_next` after PreCodegen fn slice_iter_next(_1: &mut std::slice::Iter<'_, T>) -> Option<&T> { debug it => _1; let mut _0: std::option::Option<&T>; bb0: { _0 = as Iterator>::next(move _1) -> [return: bb1, unwind unreachable]; } bb1: { return; } }