Consider fields to be inhabited if they are unstable

2025-03-18 18:23:32 +00:00
parent 75530e9f72
commit f6107ca173
6 changed files with 95 additions and 1 deletions
--- a/compiler/rustc_pattern_analysis/src/rustc.rs
+++ b/compiler/rustc_pattern_analysis/src/rustc.rs
@@ -232,7 +232,11 @@ impl<'p, 'tcx: 'p> RustcPatCtxt<'p, 'tcx> {
                            let is_visible =
                                adt.is_enum() || field.vis.is_accessible_from(cx.module, cx.tcx);
                            let is_uninhabited = cx.is_uninhabited(*ty);
-                            let skip = is_uninhabited && !is_visible;
+                            let is_unstable = cx
+                                .tcx
+                                .lookup_stability(field.did)
+                                .is_some_and(|stab| stab.is_unstable());
+                            let skip = is_uninhabited && (!is_visible || is_unstable);
                            (ty, PrivateUninhabitedField(skip))
                        });
                        cx.dropless_arena.alloc_from_iter(tys)