[GHC] #10576: REPL returns list of all imported names when operator completion requested

[GHC]

#10576: REPL returns list of all imported names when operator completion requested
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              Reporter:  Geraldus    |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  GHCi        |           Version:  7.8.4
              Keywords:              |  Operating System:  Unknown/Multiple
  completions complete command       |   Type of failure:  Incorrect result
  operator                           |  at runtime
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 When querying completions for operators GHCi returns a list containing all
 imported names rather than suitable completions.

 For example, if you simply start GHCi and run `:complete repl ">>"`
 command it will give you all names from base and Prelude.  Then if you
 import something else, for example `:m +Data.Text`, the result of query
 will contain names from Data.Text also.

 In case of projects (`cabal repl`) things are worst, because returned list
 contains all names imported project-wise and it could be really huge.

 GHCi behaves similarly with following queries:
 :complete repl "(>>"
 :complete repl "Prelude.>>"
 :complete repl "Prelude.(>>"

 I only tested this on OS X 10.9, GHC 7.8.4

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10576>
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