fix corner case in reduce_vars (#4663)

fixes #4662
2021-02-18 15:24:55 +00:00
parent a7bcd4d613
commit 7b4fd858ba
2 changed files with 28 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -864,7 +864,11 @@ merge(Compressor.prototype, {
                    push_ref(d, lhs);
                    if (d.fixed) {
                        lhs.fixed = d.fixed;
-                        lhs.fixed.assigns = [ node ];
+                        if (lhs.fixed.assigns) {
+                            lhs.fixed.assigns.push(node);
+                        } else {
+                            lhs.fixed.assigns = [ node ];
+                        }
                    }
                } else {
                    lhs.walk(tw);