微信小程序模拟机环境，突然报'replace' undefined错误，[图片] 然后页面就成 [图片]这样了

[渲染层错误] TypeError: Cannot read property 'replace' of undefined     at rewritor (http://127.0.0.1:63695/__pageframe__/__extendedlib__/weui/latest/pageframe.js:176:44)     at http://127.0.0.1:63695/__pageframe__/__extendedlib__/weui/latest/pageframe.js:194:127 [渲染层错误] webviewScriptError Cannot read property 'replace' of undefined TypeError: Cannot read property 'replace' of undefined     at rewritor (http://127.0.0.1:63695/__pageframe__/__extendedlib__/weui/latest/pageframe.js:176:44)     at http://127.0.0.1:63695/__pageframe__/__extendedlib__/weui/latest/pageframe.js:194:127 [渲染层错误] Uncaught

如:page1 -> page2 -> page3 -> page4. 在page4的时候,按顶部返回,直接返回到1,忽略中间的page2 和 page3. 这个如何搞?