[GHC] #10946: Typed hole inside typed Template Haskell bracket causes panic

[GHC]

#10946: Typed hole inside typed Template Haskell bracket causes panic
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        Reporter:  jstolarek         |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Template Haskell  |              Version:  7.10.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:  th/T10946
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by RyanGlScott):

 * cc: Tritlo (added)


Comment:

 It looks like much of the slowdown was introduced in commit
 cbdea95938bf09e8e3e7be31918549224d171873 (`Sort valid substitutions for
 typed holes by "relevance"`).

 Tritlo, do you have any idea what might be happening here?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10946#comment:11>
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