1 files changed, 1 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js
index 6010752d..02c034f6 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1982,6 +1982,7 @@ merge(Compressor.prototype, {
                             force_single = true;
                             continue;
                         }
+                        if (replaced == assign_pos) assign_used = true;
                         var def = lhs.definition();
                         abort = false;
                         hit_index = 0;