[GHC] #14368: GHC 8.2.1 doesn't inform you when the monomorphism restriction kicks in anymore

GHC ghc-devs at haskell.org
Fri Oct 20 13:18:45 UTC 2017


#14368: GHC 8.2.1 doesn't inform you when the monomorphism restriction kicks in
anymore
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        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.2.1
  checker)                           |
      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 RyanGlScott):

 I'm OK with not being able to report every possible occurrences of the
 monomorphism restriction. But as you've demonstrated, GHC clearly //can//
 detect that the monorphism restriction is kicking in here (in a
 warning)—can't we just copy that message in the error?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14368#comment:3>
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