fix corner case in `properties` (#3390)

fixes #3389

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/compress.js b/lib/compress.js
index 1a1b64f9..7d9a74d3 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6067,7 +6067,7 @@ merge(Compressor.prototype, {
             }
         }
         var parent = compressor.parent();
-        if (compressor.option("reduce_vars") && is_lhs(self, parent) !== self) {
+        if (compressor.option("reduce_vars") && is_lhs(compressor.self(), parent) !== compressor.self()) {
             var def = self.definition();
             var fixed = self.fixed_value();
             var single_use = def.single_use && !(parent instanceof AST_Call && parent.is_expr_pure(compressor));
@@ -6689,7 +6689,7 @@ merge(Compressor.prototype, {
                 return sym;
             }
         }
-        if (is_lhs(self, compressor.parent())) return self;
+        if (is_lhs(compressor.self(), compressor.parent())) return self;
         if (key !== prop) {
             var sub = self.flatten_object(property, compressor);
             if (sub) {
@@ -6787,7 +6787,7 @@ merge(Compressor.prototype, {
                 col: self.start.col
             });
         }
-        if (is_lhs(self, compressor.parent())) return self;
+        if (is_lhs(compressor.self(), compressor.parent())) return self;
         if (compressor.option("unsafe_proto")
             && self.expression instanceof AST_Dot
             && self.expression.property == "prototype") {