fix corner case in collapse_vars (#4686)

fixes #4685
2021-02-24 21:31:12 +00:00
parent a5e6946f74
commit 72805ea73a
2 changed files with 24 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2119,7 +2119,9 @@ merge(Compressor.prototype, {
                            }
                            arg = null;
                        }
-                        if (node instanceof AST_ObjectIdentity && (fn_strict || !tw.find_parent(AST_Scope))) {
+                        if (node instanceof AST_ObjectIdentity && (fn_strict
+                            || !tw.find_parent(AST_Scope)
+                            || is_arrow(arg) && iife instanceof AST_New)) {
                            arg = null;
                            return true;
                        }