fix corner case in merge_vars (#4299)

fixes #4298
2020-11-18 15:43:55 +00:00
parent 35283e5dd1
commit f6a83f7944
2 changed files with 45 additions and 3 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4749,9 +4749,13 @@ merge(Compressor.prototype, {
                        var def = ref.definition();
                        var ldef = node.variables.get(ref.name);
                        if (ldef && (ldef === def || def.undeclared || node.parent_scope.find_variable(ref) === def)) {
+                            references[def.id] = false;
                            references[ldef.id] = false;
                        } else {
+                            var save = segment;
+                            pop();
                            mark(ref, true, false);
+                            segment = save;
                        }
                        return true;
                    });