[Haskell-cafe] Use of the Try typeclass
Edward Z. Yang
ezyang at MIT.EDU
Thu Dec 31 01:54:37 EST 2009
Excerpts from Michael Snoyman's message of Thu Dec 31 00:43:52 -0500 2009:
> What version of the packages are you using? Can you give the output of:
> ghc-pkg list|grep failure
control-monad-failure-mtl-0.5.0, cpphs-1.8, cpphs-1.9,
failure-0.0.0.1, happstack-0.3.2, happstack-data-0.3.3
ezyang at javelin:~$ cabal upgrade failure
No packages to be installed. All the requested packages are already installed.
If you want to reinstall anyway then use the --reinstall flag.
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