fix corner case in unsafe (#4783)

2021-03-16 01:42:28 +00:00
parent e821787095
commit 77c9116c91
2 changed files with 49 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -8522,11 +8522,12 @@ merge(Compressor.prototype, {
            } else if (exp instanceof AST_Dot) switch (exp.property) {
              case "toString":
                // x.toString() ---> "" + x
-                if (self.args.length == 0 && !exp.expression.may_throw_on_access(compressor)) {
+                var expr = exp.expression;
+                if (self.args.length == 0 && !(expr.may_throw_on_access(compressor) || expr instanceof AST_Super)) {
                    return make_node(AST_Binary, self, {
                        operator: "+",
                        left: make_node(AST_String, self, { value: "" }),
-                        right: exp.expression,
+                        right: expr,
                    }).optimize(compressor);
                }
                break;