[GHC] #10896: BadSock triggers failing ASSERT

[GHC]

#10896: BadSock triggers failing ASSERT
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  7.11
  checker)                           |
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:  indexed-
                                     |  types/should_fail/BadSock
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1260
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by goldfire):

 Simon, I remember you suggesting a better approach here. But I'm afraid I
 didn't note it down nor implement it. Do you remember what it was? Was it
 to protect all calls to `checkValidType` from !TcTyClsDecls? Thanks!

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10896#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler