On Sat, Apr 25, 2015 at 3:45 PM, Peng Yu <pengyu...@gmail.com> wrote:

> Why cabal install print so many irrelevant messages? Is it better to
> follow Unix "Rule of Silence" to only print usage error messages?
>

This is not an irrelevant message:

asn1-parse-0.9.0 (reinstall) changes: text-1.2.0.4 added
>

It's an indication that things are about to go very wrong, as indeed they
did. In fact, the errors you got indicate quite a lot of problems with your
Haskell installation; you apparently have a bunch of broken packages.

-- 
brandon s allbery kf8nh                               sine nomine associates
allber...@gmail.com                                  ballb...@sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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