[GHC] #14717: Hidden package hints no longer display

GHC ghc-devs at haskell.org
Tue Jan 30 13:41:25 UTC 2018


#14717: Hidden package hints no longer display
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        Reporter:  snoyberg          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Poor/confusing    |  Unknown/Multiple
  error message                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by taylorfausak):

 Thanks for reporting this! I noticed this change in behavior but didn't
 think too much about it. It hasn't affected my day-to-day that much
 because I know which packages most modules I use come from. However it
 would be nice to get the old suggestion back. And since I don't see the
 old suggestion in this thread yet, here it is:


 {{{
 > cat Main.hs
 import Data.Map
 main = pure ()

 > stack --resolver ghc-8.0.2 exec -- ghc -hide-all-packages -package base
 Main.hs
 [1 of 1] Compiling Main             ( Main.hs, Main.o )

 Main.hs:1:1: error:
     Failed to load interface for ‘Data.Map’
     It is a member of the hidden package ‘containers-0.5.7.1’.
     Use -v to see a list of the files searched for.
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14717#comment:3>
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