fix corner case in collapse_vars (#4733)

fixes #4732
2021-03-04 09:13:54 +00:00
parent 20be5209c0
commit cb50a2d192
2 changed files with 50 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2675,9 +2675,10 @@ merge(Compressor.prototype, {
                    if (hit_index <= end) return handle_custom_scan_order(node, tt);
                    hit = true;
                    if (node instanceof AST_VarDef) {
-                        node.value = null;
                        declare_only[node.name.name] = (declare_only[node.name.name] || 0) + 1;
                        if (value_def) value_def.replaced++;
+                        node = node.clone();
+                        node.value = null;
                        return node;
                    }
                    return in_list ? List.skip : null;