fix corner case in reduce_vars & unused (#4465)

fixes #4464
2020-12-26 08:52:16 +00:00
parent be1f5199f4
commit 94f3819dc6
3 changed files with 87 additions and 6 deletions
--- a/test/reduce.js
+++ b/test/reduce.js
@@ -352,6 +352,11 @@ module.exports = function reduce_test(testcase, minify_options, reduce_options)
                    }
                }
            }
+            else if (node instanceof U.AST_Spread) {
+                node.start._permute++;
+                CHANGED = true;
+                return node.expression;
+            }
            else if (node instanceof U.AST_Switch) {
                var expr = [
                    node.expression,                         // switch expression