fix corner case in unused (#5090)

fixes #5089
2021-07-20 18:10:58 +01:00
parent 85968dee54
commit 8926a2f327
4 changed files with 58 additions and 5 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -7276,6 +7276,7 @@ merge(Compressor.prototype, {
            }

            function retain_lhs(node) {
+                if (node instanceof AST_DefaultValue) return retain_lhs(node.name);
                if (node instanceof AST_Destructured) {
                    if (value === null) {
                        value = make_node(AST_Number, node, { value: 0 });
@@ -7289,7 +7290,6 @@ merge(Compressor.prototype, {
                    }
                    return make_node(AST_DestructuredObject, node, { properties: [] });
                }
-                if (node instanceof AST_DefaultValue) node = node.name;
                node.__unused = null;
                return node;
            }