usebatch_impl::batch_impl;// two same-level segments need an evenly split leaf (3 elements cannot be
// split across 2 segments)
#[batch_impl((u8, u16, u32)impl{(A@.., B@..,)} { fnn(&self) -> usize { 0 } })]traitBadVarSegUneven{fnn(&self)->usize;}fnmain(){}