[GHC] #11069: :cd in GHCi unloads modules

[GHC]

#11069: :cd in GHCi unloads modules
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        Reporter:  mgsloan           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:
       Component:  GHCi              |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by goldfire):

 Replying to [comment:1 thomie]:
 > > How about removing any dependency in GHC on the current working
 directory, and instead store it when the session is initialized?
 >
 > Go ahead. GHCi is just as unmaintained as hpc, so it's all yours to fix.

 Whoa. I don't think of GHCi as unmaintained. The debugger in GHCi is
 regrettably unmaintained. But the rest of it gets active work, no?

 And I don't agree with the proposed change. I may be an exception to the
 normal Haskell workflow, but I do most of my work in GHCi without
 reference to a cabalized package. (Usually, I'm just testing different
 constructs, not building a project intended for release.) I use `:cd` and
 expect it to change my working directory used for finding modules. If I
 understand correctly, the proposed change would eliminate this workflow.
 (I do find it annoying that all my modules get unloaded when I move
 directories, as that's not always my intent.)

 So I think a bit of a larger discussion is in order before making this
 breaking change.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11069#comment:2>
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