[GHC] #16050: Instance resolution error message unclear, because of missing kind information

GHC ghc-devs at haskell.org
Fri Dec 14 22:06:25 UTC 2018


#16050: Instance resolution error message unclear, because of missing kind
information
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        Reporter:  chessai           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             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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Comment (by chessai):

 Now that I think of this, this confused me a lot more the first time I
 came across such an error. The error message just says nothing about the
 kinds, so saying that an instance doesn't exist is pretty confusing.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16050#comment:1>
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