fix unused crash with top-level AST_Var (#2066)

fixes #2063
2017-06-07 19:12:35 +08:00
parent 82fefc5d29
commit a7971f4e34
2 changed files with 17 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2278,7 +2278,9 @@ merge(Compressor.prototype, {
                    }
                    return node;
                }
-                if (node instanceof AST_Definitions && !(parent instanceof AST_ForIn && parent.init === node)) {
+                if (node instanceof AST_Definitions
+                    && !(parent instanceof AST_ForIn && parent.init === node)
+                    && (drop_vars || !(parent instanceof AST_Toplevel) && !(node instanceof AST_Var))) {
                    // place uninitialized names at the start
                    var body = [], head = [], tail = [];
                    // for unused names whose initialization has