fix corner case in dead_code (#4983)

fixes #4982
2021-05-30 02:00:48 +01:00
parent 8d23496e0f
commit b9d5bba5fb
2 changed files with 48 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3646,6 +3646,8 @@ merge(Compressor.prototype, {
        var block;
        stat.walk(new TreeWalker(function(node, descend) {
            if (node instanceof AST_DefClass) {
+                node.extends = null;
+                node.properties = [];
                push(node);
                return true;
            }