improve `export` compatibility mode (#4704)

diff --git a/test/sandbox.js b/test/sandbox.js
index b369ba8..adee26c 100644 (file)
--- a/test/sandbox.js
+++ b/test/sandbox.js
@@ -53,7 +53,7 @@ exports.strip_exports = function(code) {
     var count = 0;
     return code.replace(/\bexport(?:\s*\{[^}]*}\s*?(?:$|\n|;)|\s+default\b(?:\s*(\(|\{|class\s*\{|class\s+(?=extends\b)|(?:async\s+)?function\s*(?:\*\s*)?\())?|\b)/g, function(match, header) {
         if (!header) return "";
-        if (header.length == 1) return "!!" + header;
+        if (header.length == 1) return "0, " + header;
         return header.slice(0, -1) + " _" + ++count + header.slice(-1);
     });
 };