[GHC] #8577: Polymorphism and typed TH

[GHC]

#8577: Polymorphism and typed TH
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        Reporter:  monoidal          |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Template Haskell  |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by Simon Peyton Jones <simonpj@…>):

 In [changeset:"8b642debfabe00377f47d461d31d70636bf0fce3/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8b642debfabe00377f47d461d31d70636bf0fce3"
 Typecheck typed TH splices properly (fix Trac #8577)

 This was an egregious error.  If e :: T (Q ty1)
 then when we have the splice

      $e :: ty2

 we must ensure that ty1~ty2 before we even think about
 running the splice!

 I took the opportunity to remove the dead-code tcSpliceDecls
 altogether.
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8577#comment:1>
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