[GHC] #9651: Increasing verbosity doesn't give useful information for why we couldn't load package

[GHC]

#9651: Increasing verbosity doesn't give useful information for why we couldn't
load package
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        Reporter:  ezyang            |                Owner:  ezyang
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.9
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by ezyang):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 I think I fixed this in

 {{{
 commit 39b71e81ec1044518f065d0055676d713521e483
 Author: Edward Z. Yang <ezyang at cs.stanford.edu>
 Date:   Tue Oct 27 14:47:33 2015 -0700

     Reimplement shadowing on a per database basis.

     Summary:
     This commit reimplements shadowing on package databases by doing
     the shadowing calculation on a per-database basis: specifically,
     if a later package database shadows a package from the earlier
     databases, we first remove that package (and its transitive
     dependencies) before merging the databases together.

     This should also fix bootstrapping GHC HEAD with HEAD.

     Signed-off-by: Edward Z. Yang <ezyang at cs.stanford.edu>

     Test Plan: validate

     Reviewers: ggreif, bgamari, austin

     Subscribers: thomie

     Differential Revision: https://phabricator.haskell.org/D1385
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9651#comment:1>
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