[GHC] #14627: qAddTopDecls: can't convert top-level declarations

[GHC]

#14627: qAddTopDecls: can't convert top-level declarations
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        Reporter:  tianxiaogu        |                Owner:  mgsloan
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Template Haskell  |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4914
       Wiki Page:                    |
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Comment (by mgsloan):

 In addition to D4914, which changes this from panic-ing to just a regular
 error, I've also published https://phabricator.haskell.org/D4923 which
 improves the error for this specific case.  Instead it says "Data
 constructor not in scope: Bool"

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14627#comment:5>
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