fix corner case in reduce_vars (#4211)

fixes #4210
2020-10-13 08:52:03 +01:00
parent 3096f6fdad
commit 0e234a25c5
3 changed files with 41 additions and 5 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6651,7 +6651,7 @@ merge(Compressor.prototype, {
            var s = def.scope;
            do {
                s = s.parent_scope;
-                if (s.variables.has(node.name)) return false;
+                if (s.var_names()[node.name]) return false;
            } while (s !== scope);
            return true;
        }) ? make_node(AST_Var, self, {