fix corner case in collapse_vars (#4048)

fixes #4047
2020-08-09 22:48:56 +01:00
parent e2237d8cd2
commit 49670d216b
2 changed files with 62 additions and 3 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1984,9 +1984,12 @@ merge(Compressor.prototype, {
                if (expr.name instanceof AST_SymbolFunarg) {
                    var index = compressor.self().argnames.indexOf(expr.name);
                    var args = compressor.parent().args;
-                    if (args[index]) args[index] = make_node(AST_Number, args[index], {
-                        value: 0
-                    });
+                    if (args[index]) {
+                        args[index] = make_node(AST_Number, args[index], {
+                            value: 0
+                        });
+                        expr.name.definition().fixed = false;
+                    }
                    return true;
                }
                var end = hit_stack.length - 1;