fix corner case in mangle (#4528)

fixes #4527
2021-01-09 20:20:43 +00:00
parent 770f3ba5fe
commit 0818d396c5
2 changed files with 36 additions and 0 deletions
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -611,6 +611,7 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
            if (!(sym instanceof AST_SymbolConst)) return false;
            var scope = def.scope.resolve();
            if (def.scope === scope) return false;
+            if (def.scope.parent_scope.find_variable(sym.name)) return false;
            redef = scope.def_variable(sym);
            scope.to_mangle.push(redef);
        }