与cabal更新错误 [英] Error with cabal update

问题描述

在全新安装的Haskell-Platform（64位OSX版本，来自 http：// www .haskell.org / platform / mac.html ）我收到以下错误消息：

On a fresh install install of Haskell-Platform (64 bit OSX version from http://www.haskell.org/platform/mac.html) I get the following error:

Downloading the latest package list from hackage.haskell.org
Warning: http error: Network.Browser.request: Error raised ErrorParse "Invalid
cabal: Char.intToDigit: not a digit -1

发出命令 cabal update 后，没有任何搜索结果，我不知道

After issuing the command cabal update. No luck with any searches and I have no idea where this error is coming from.

推荐答案

以下是HTTP跟踪器上的相关错误消息：

Here's the relevant bug ticket on the HTTP tracker: https://github.com/haskell/HTTP/issues/98

对于某些网络配置，这似乎是一个（罕见的）问题，导致（稍）无效的结果被返回，并且HTTP库过于严格。

It seems to be a (rare) issue with certain network configurations that result in (slightly) invalid results being returned and the HTTP library being overly strict.

安装最近版本的 cabal 可执行文件（一个二进制文件可从cabal网站下载）将提供一种解决方法，因为默认传输（并且可配置）是https，而不是http，并且该传输将调用到 curl 或 wget ，它们在处理分析http响应的方式上更为宽松。

Installing a recent version of the cabal executable (a binary is available for download from the cabal website) will provide a workaround, in that the default transport (and it is configurable) is https, not http, and that transport will call out to curl or wget, which are more lax in how they handle parsing http responses.

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