fix corner case in pure_getters (#4940)

fixes #4939
2021-05-15 19:12:58 +01:00
parent a7698f8845
commit e13615549e
2 changed files with 28 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3776,7 +3776,8 @@ merge(Compressor.prototype, {
        def(AST_Null, return_true);
        def(AST_Object, function(compressor, force) {
            return is_strict(compressor, force) && !all(this.properties, function(prop) {
-                return prop instanceof AST_ObjectKeyVal;
+                if (!(prop instanceof AST_ObjectKeyVal)) return false;
+                return !(prop.key == "__proto__" && prop.value._dot_throw(compressor, force));
            });
        });
        def(AST_ObjectIdentity, function(compressor, force) {