[GHC] #9693: Reloading GHCi with Template Haskell names can panic GHC

[GHC]

#9693: Reloading GHCi with Template Haskell names can panic GHC
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              Reporter:  maxs        |            Owner:
                  Type:  bug         |           Status:  infoneeded
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.8.3
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Unknown
       Type of failure:  GHC         |       Blocked By:
  rejects valid program              |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by goldfire):

 * status:  new => infoneeded


Comment:

 I can't reproduce this problem. When I load your original files (that is,
 with `newName`, not `mkName`), I get this:

 {{{
     Duplicate exact Name ‘X’
       Probable cause: you used a unique Template Haskell name (NameU),
       perhaps via newName, but bound it multiple times
       If that's it, then -ddump-splices might be useful
 }}}

 The error seems reasonable to me: the name is bound both as a type and as
 a data constructor. I'm also on GHC 7.8.3 on a Mac. Can you try again to
 reproduce the problem? Maybe your GHCi state had something else going
 on... perhaps a `ghci.conf` file?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9693#comment:1>
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