[GHC] #10615: Panic; no skolem info (partial type signatures)

[GHC]

#10615: Panic; no skolem info (partial type signatures)
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        Reporter:  holzensp          |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by holzensp):

 BTW, actually turning on ```PartialTypeSignatures``` gives the expected
 output:
 {{{
 GHCi, version 7.10.1: http://www.haskell.org/ghc/  :? for help
 [1 of 1] Compiling Test             ( Test.hs, interpreted )

 Test.hs:47:6: Warning:
     Found hole ‘_f’ with type: a -> b -> a
     Where: ‘a’ is a rigid type variable bound by
                the inferred type of f :: a -> b -> a at Test.hs:48:1
            ‘b’ is a rigid type variable bound by
                the inferred type of f :: a -> b -> a at Test.hs:48:1
     In the type signature for ‘f’: _f
 Ok, modules loaded: Test.
 *Test> :r
 [1 of 1] Compiling Test             ( Test.hs, interpreted )

 Test.hs:47:6: Warning:
     Found hole ‘_’ with inferred constraints: ()
     In the type signature for ‘f’: _ => _f

 Test.hs:47:11: Warning:
     Found hole ‘_f’ with type: a -> b -> a
     Where: ‘a’ is a rigid type variable bound by
                the inferred type of f :: a -> b -> a at Test.hs:48:1
            ‘b’ is a rigid type variable bound by
                the inferred type of f :: a -> b -> a at Test.hs:48:1
     In the type signature for ‘f’: _ => _f
 Ok, modules loaded: Test.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10615#comment:1>
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