将 ghc 升级到 7.0.3 会破坏 wai-handler-devel
我正在 Yesod 框架上开发一个 Web 应用程序，使用 wai-handler-devel 来运行服务器。
pacman -Syu（在 Arch Linux 上）将 ghc 从 7.0.2 升级到 7.0.3，现在服务器抛出异常。
$ wai-handler-devel 3000 App.Controller withAppSimple
Attempting to interpret your app...
wai-handler-devel: /usr/lib/ghc-7.0.2/package.conf.d/package.cache:
openBinaryFile: does not exist (No such file or directory)
经过一番挖掘后，我意识到该文件存在于 /usr/lib/ghc-7.0.3/package.conf.d/ 中，因此我将该文件夹重命名为 ghc-7.0。 3 希望这至少能暂时解决问题（直到我们的 Haskell 人员度假回来）。
任何关于从哪里开始的建议都会非常有帮助。谢谢！
I'm developing a web app on Yesod framework, using wai-handler-devel to run the server.
A pacman -Syu (on Arch Linux) upgraded ghc from 7.0.2 to 7.0.3 and now the server throws an exception.
$ wai-handler-devel 3000 App.Controller withAppSimple
Attempting to interpret your app...
wai-handler-devel: /usr/lib/ghc-7.0.2/package.conf.d/package.cache:
openBinaryFile: does not exist (No such file or directory)
After a bit of digging I realized that the file existed in /usr/lib/ghc-7.0.3/package.conf.d/, so I renamed that folder to ghc-7.0.3 in the hopes that that would at least temporarily solve the problem (until our Haskell-guy comes back from holiday).
Any suggestion on where to even begin would be very helpful. Thanks!
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当您升级 ghc 版本（不仅仅是 wai-handler-devel）时，您需要重新安装所有软件包。您也可以删除所有旧的。
you need to re-install all your packages when you upgrade a ghc version (not just wai-handler-devel). You may as well delete all the old ones.