fix corner case in unused (#3665)

fixes #3664
2020-01-01 20:24:30 +08:00
parent d83d3d741a
commit 746f5f6c62
2 changed files with 21 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3913,7 +3913,7 @@ merge(Compressor.prototype, {
                    if (node instanceof AST_Assign) {
                        if (!in_use || node.left === sym && def.id in fixed_ids && fixed_ids[def.id] !== node) {
                            value = get_rhs(node);
-                            if (node.write_only) {
+                            if (node.write_only === true) {
                                value = value.drop_side_effect_free(compressor) || make_node(AST_Number, node, {
                                    value: 0
                                });