Function rustc_mir_build::thir::pattern::check_match::non_exhaustive_match

fn non_exhaustive_match<'p, 'tcx>(
    cx: &MatchCheckCtxt<'p, 'tcx>,
    scrut_ty: Ty<'tcx>,
    sp: Span,
    witnesses: Vec<DeconstructedPat<'p, 'tcx>>,
    arms: &[Arm<'tcx>],
    expr_span: Span
)

Report that a match is not exhaustive.