[GHC] #11376: Inconsistent specified type variables among functions and datatypes/classes when using -XTypeApplications

[GHC]

#11376: Inconsistent specified type variables among functions and datatypes/classes
when using -XTypeApplications
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  goldfire
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |             Keywords:
      Resolution:                    |  TypeApplications
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 What should `:t bar @Int` say?  I answer: the same as whatever type we
 infer for
 {{{
 it = bar @Int
 }}}
 I guess that's answer (3): `it :: forall {b}. Int -> b -> Int`.  No, it
 doesn't imply that `bar @Int @Bool` is illegal, any more than inferring
 that type for `it` implies that `bar @Int @Bool` is illegal.  Use `:info`
 if you want to see which variables are specified!

 This rule is simple.  Just infer the type, precisely as if it was a let-
 binding.  No more and no less.

 Simon

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11376#comment:22>
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