node.start may not be defined

2018-09-02 17:56:54 +08:00 · 2018-09-02 17:56:54 +08:00 · f7851aaf0f
commit f7851aaf0f
parent ea999b0e92
1 changed files with 1 additions and 0 deletions
--- a/lib/output.js
+++ b/lib/output.js
@ -482,6 +482,7 @@ function OutputStream(options) {
                    || parent instanceof AST_Sequence && parent.expressions[0] === node
                    || parent instanceof AST_Sub && parent.expression === node
                    || parent instanceof AST_UnaryPostfix) {
+                    if (!node.start) return;
                    var text = node.start.comments_before;
                    if (text && text._dumped !== self) {
                        text._dumped = self;