suppress unsafe_proto for LHS expressions (#2804)

2018-01-17 20:41:51 +08:00
parent cff3bf4914
commit d3ce2bc9e7
2 changed files with 20 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -5644,6 +5644,7 @@ merge(Compressor.prototype, {
        if (def) {
            return def.optimize(compressor);
        }
+        if (is_lhs(self, compressor.parent())) return self;
        if (compressor.option("unsafe_proto")
            && self.expression instanceof AST_Dot
            && self.expression.property == "prototype") {
@@ -5682,7 +5683,6 @@ merge(Compressor.prototype, {
                break;
            }
        }
-        if (is_lhs(self, compressor.parent())) return self;
        var sub = self.flatten_object(self.property, compressor);
        if (sub) return sub.optimize(compressor);
        var ev = self.evaluate(compressor);