[GHC] #15050: ScopedTypeVariables could allow more programs

[GHC]

#15050: ScopedTypeVariables could allow more programs
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        Reporter:  nomeata           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.1
      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 nomeata):

 >  Easiest to leave `SigTv` alone; and just change what sort of tyvar is
 used in a pattern type signature; which is what you have done.

 You don't the name to be changed? Good with me.

 >  GHC proposal?

 There are so many proposals already … but I guess that’s a good thing :-)
 Will whip something up.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15050#comment:15>
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