fix corner case in reduce_vars (#3923)

fixes #3922
2020-05-24 00:38:40 +01:00
parent d1cc5270a3
commit 2c4d7d66ef
2 changed files with 28 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -738,8 +738,7 @@ merge(Compressor.prototype, {
                        var value = iife.args[i];
                        d.fixed = function() {
                            var j = fn.argnames.indexOf(arg);
-                            if (j < 0) return value;
-                            return iife.args[j] || make_node(AST_Undefined, iife);
+                            return (j < 0 ? value : iife.args[j]) || make_node(AST_Undefined, iife);
                        };
                        tw.loop_ids[d.id] = tw.in_loop;
                        mark(tw, d, true);