我以某种方式弄乱了MacOs 10.14.6上的haskell安装
我已经删除了〜/ .stack和〜/ .cabal文件夹，然后运行curl https://get-ghcup.haskell.org -sSf | sh
我已经使用安装了ghc
brew install haskell-stack
然后使用安装堆栈
stack --version: Version 2.1.3 x86_64
cabal --version: cabal-install version 3.0.0.0
stack setup
运行The GHC located at /Users/angudavi/.stack/programs/x86_64-osx/ghc-8.6.5/bin/ghc-8.6.5 failed to compile a sanity check. Please see:
http://docs.haskellstack.org/en/stable/install_and_upgrade/
for more information. Exception was:
Received ExitFailure 1 when running
Raw command: /Users/angudavi/.stack/programs/x86_64-osx/ghc-8.6.5/bin/ghc-8.6.5 /private/var/folders/rc/05xmxx2d1z94wfq8gjy5g8640000gn/T/stack-sanity-check-18076106c692e89a/Main.hs -no-user-package-db
Run from: /private/var/folders/rc/05xmxx2d1z94wfq8gjy5g8640000gn/T/stack-sanity-check-18076106c692e89a/
Standard error:
Loaded package environment from /Users/angudavi/.ghc/x86_64-darwin-8.6.5/environments/default
ghc: can't find a package database at /Users/angudavi/.cabal/store/ghc-8.6.5/package.db
时，我得到了：
$ export A=1
$ eval "echo $A; echo $A; lll; echo $?"