fix `reduce_vars` on `AST_Accessor` (#2776)

fixes #2774

2 files changed, 28 insertions, 1 deletions

diff --git a/lib/compress.js b/lib/compress.js
index 21d79b08..b35e453c 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -467,8 +467,9 @@ merge(Compressor.prototype, {
             if (node instanceof AST_SymbolRef) d.references.push(node);
             d.fixed = false;
         });
-        def(AST_Accessor, function(tw, descend) {
+        def(AST_Accessor, function(tw, descend, compressor) {
             push(tw);
+            reset_variables(tw, compressor, this);
             descend();
             pop(tw);
             return true;
diff --git a/test/compress/reduce_vars.js b/test/compress/reduce_vars.js
index 3d993b90..ec0471a8 100644
--- a/test/compress/reduce_vars.js
+++ b/test/compress/reduce_vars.js
@@ -5276,3 +5276,29 @@ duplicate_lambda_defun_name_2: {
     }
     expect_stdout: "0"
 }
+
+issue_2774: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log({
+            get a() {
+                var b;
+                (b = true) && b.c;
+                b = void 0;
+            }
+        }.a);
+    }
+    expect: {
+        console.log({
+            get a() {
+                var b;
+                (b = true) && b.c;
+                b = void 0;
+            }
+        }.a);
+    }
+    expect_stdout: "undefined"
+}