fix corner case in `sequences` (#3491)

fixes #3490

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/compress.js b/lib/compress.js
index c903d9af..e39435c7 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2030,14 +2030,14 @@ merge(Compressor.prototype, {
                 n--;
                 CHANGED = true;
                 var left = prev.body;
-                return make_sequence(left, [ left, right ]).transform(compressor);
+                return make_sequence(left, [ left, right ]);
             }
             var n = 0, prev;
             for (var i = 0; i < statements.length; i++) {
                 var stat = statements[i];
                 if (prev) {
                     if (stat instanceof AST_Exit) {
-                        stat.value = cons_seq(stat.value || make_node(AST_Undefined, stat).transform(compressor));
+                        stat.value = cons_seq(stat.value || make_node(AST_Undefined, stat)).transform(compressor);
                     } else if (stat instanceof AST_For) {
                         if (!(stat.init instanceof AST_Definitions)) {
                             var abort = false;