[GHC] #8113: Cannot override ghci builtin commands with :def[!]

[GHC]

#8113: Cannot override ghci builtin commands with :def[!]
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        Reporter:  duncan      |            Owner:
            Type:  bug         |           Status:  patch
        Priority:  normal      |        Milestone:  7.8.1
       Component:  GHCi        |          Version:  7.6.3
      Resolution:              |         Keywords:
Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple             |       Difficulty:  Easy (less than 1 hour)
 Type of failure:  Other       |       Blocked By:
       Test Case:              |  Related Tickets:
        Blocking:              |
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Comment (by Herbert Valerio Riedel <hvr@…>):

 In [changeset:ab51c7a274bb77da8589e72d23518ecca6e621a4/testsuite]:
 {{{
 #!CommitTicketReference repository="testsuite"
 revision="ab51c7a274bb77da8589e72d23518ecca6e621a4"
 Add regression test for #8113

 Depends on fix in 3229eadbff857b110f20ffddb80d5f7abd5d7216 to pass
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8113#comment:10>
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