pub(crate) fn lint_nonexhaustive_missing_variants<'p, 'tcx>(
    cx: &MatchCheckCtxt<'p, 'tcx>,
    arms: &[MatchArm<'p, 'tcx>],
    pat_column: &PatternColumn<'p, 'tcx>,
    scrut_ty: Ty<'tcx>
)