Add not-null pointer patterns to pattern types

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -2611,6 +2611,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
                         .span_delayed_bug(ty_span, "invalid base type for range pattern")),
                 }
             }
+            hir::TyPatKind::NotNull => Ok(ty::PatternKind::NotNull),
             hir::TyPatKind::Or(patterns) => {
                 self.tcx()
                     .mk_patterns_from_iter(patterns.iter().map(|pat| {

compiler/rustc_hir_analysis/src/variance/constraints.rs

@@ -340,6 +340,7 @@ impl<'a, 'tcx> ConstraintContext<'a, 'tcx> {
                 self.add_constraints_from_const(current, start, variance);
                 self.add_constraints_from_const(current, end, variance);
             }
+            ty::PatternKind::NotNull => {}
             ty::PatternKind::Or(patterns) => {
                 for pat in patterns {
                     self.add_constraints_from_pat(current, variance, pat)