Handle all `PatExpr`s in dead code analysis

1 files changed, 12 insertions, 5 deletions

diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs
index bc2bebdfef6..95f18eaa7ef 100644
--- a/compiler/rustc_passes/src/dead.rs
+++ b/compiler/rustc_passes/src/dead.rs
@@ -13,7 +13,7 @@ use rustc_errors::MultiSpan;
 use rustc_hir::def::{CtorOf, DefKind, Res};
 use rustc_hir::def_id::{DefId, LocalDefId, LocalModDefId};
 use rustc_hir::intravisit::{self, Visitor};
-use rustc_hir::{self as hir, Node, PatExpr, PatExprKind, PatKind, TyKind};
+use rustc_hir::{self as hir, Node, PatKind, TyKind};
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::middle::privacy::Level;
 use rustc_middle::query::Providers;
@@ -636,10 +636,6 @@ impl<'tcx> Visitor<'tcx> for MarkSymbolVisitor<'tcx> {
                 let res = self.typeck_results().qpath_res(path, pat.hir_id);
                 self.handle_field_pattern_match(pat, res, fields);
             }
-            PatKind::Expr(PatExpr { kind: PatExprKind::Path(ref qpath), hir_id, .. }) => {
-                let res = self.typeck_results().qpath_res(qpath, *hir_id);
-                self.handle_res(res);
-            }
             PatKind::TupleStruct(ref qpath, fields, dotdot) => {
                 let res = self.typeck_results().qpath_res(qpath, pat.hir_id);
                 self.handle_tuple_field_pattern_match(pat, res, fields, dotdot);
@@ -651,6 +647,17 @@ impl<'tcx> Visitor<'tcx> for MarkSymbolVisitor<'tcx> {
         self.in_pat = false;
     }
 
+    fn visit_pat_expr(&mut self, expr: &'tcx rustc_hir::PatExpr<'tcx>) {
+        match &expr.kind {
+            rustc_hir::PatExprKind::Path(qpath) => {
+                let res = self.typeck_results().qpath_res(qpath, expr.hir_id);
+                self.handle_res(res);
+            }
+            _ => {}
+        }
+        intravisit::walk_pat_expr(self, expr);
+    }
+
     fn visit_path(&mut self, path: &hir::Path<'tcx>, _: hir::HirId) {
         self.handle_res(path.res);
         intravisit::walk_path(self, path);