“you are using old package ‘base' version 3.x"
2011-03-26 21:29
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很清楚，这就是base的版本太低的问题，但是主要的问题是用cabal install base或则是cabal upgrade base之后反而会有一个更莫名其妙的错误Distribution/Client/Dependency/TopDown.hs:170:37-73: Non-exhaustive patterns in lambda，这就有点看不懂了。幸好有google，看了下主要是指派关系不明确的问题，但是也没有说怎么解决。再仔细想想不就是直接删除多余的那个base版本就可以了，这么简单，看来别人是不屑把这个步骤说出来！自己英文太烂！！！！好好学习英语……
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