fix corner case in arguments (#4396)

fixes #4395
2020-12-18 00:41:13 +00:00
parent 2c637fea8a
commit c1256c399a
3 changed files with 30 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -9897,7 +9897,10 @@ merge(Compressor.prototype, {
            } else if (argname instanceof AST_Destructured) {
                argname = null;
            } else if (argname && (compressor.has_directive("use strict")
-                || !(fn_parent instanceof AST_Call && index < fn_parent.args.length))) {
+                || !(fn_parent instanceof AST_Call && index < fn_parent.args.length)
+                || !all(fn.argnames, function(argname) {
+                    return !(argname instanceof AST_Destructured);
+                }))) {
                var arg_def = argname.definition();
                if (!compressor.option("reduce_vars")
                    || def.reassigned