fix corner case in reduce_vars (#4031)

fixes #4030
2020-07-31 01:05:09 +01:00
parent dfe47bcc42
commit ee632a5519
2 changed files with 27 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -587,7 +587,10 @@ merge(Compressor.prototype, {
            d.assignments++;
            var fixed = d.fixed;
            var value = eq ? node.right : node;
-            if (is_modified(compressor, tw, node, value, 0)) return;
+            if (is_modified(compressor, tw, node, value, 0)) {
+                d.fixed = false;
+                return;
+            }
            var safe = eq || safe_to_read(tw, d);
            node.right.walk(tw);
            if (safe && safe_to_assign(tw, d)) {