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-rw-r--r--lib/compress.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index 2bbd9704..f3fe8a8e 100644
--- 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
});