fix unsafe evaluation of AST_Sub (#2389)

2017-10-22 13:14:15 +08:00
parent 4ae1fb3ed8
commit 516eaef50c
2 changed files with 21 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4468,6 +4468,7 @@ merge(Compressor.prototype, {
                });
            }
        }
+        if (is_lhs(self, compressor.parent())) return self;
        var ev = self.evaluate(compressor);
        if (ev !== self) {
            ev = make_node_from_constant(ev, self).optimize(compressor);