[GHC] #10857: "ghci -XMonomorphismRestriction" doesn't turn on the monomorphism restriction

[GHC]

#10857: "ghci -XMonomorphismRestriction" doesn't turn on the monomorphism
restriction
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        Reporter:  rwbarton          |                   Owner:  cocreature
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  GHCi              |                 Version:  7.10.1
      Resolution:                    |                Keywords:  newcomer
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #3202, #3217      |  Differential Revisions:
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Comment (by cocreature):

 Hey, I looked into this and it turns out it's actually not that easy to
 move it to an earlier point because those options should be in the
 interactive DynFlags which we set only after we have overwritten the
 DynFlags using the command line arguments.

 Now there is an easy solution which consists of just putting it in the
 standard DynFlags instead of the interactive ones. In fact we already do
 this for [https://github.com/ghc/ghc/blob/master/ghc/Main.hs#L182 another
 flag]. This works just fine but obviously some tests fail now since it is
 now not limited to the interactive flags.

 The other option is to set all of the interactive DynFlags earlier, but it
 looks like we then need to have two different set of flags, modify both of
 them by the command line arguments and then set them. This does not seem
 like a very nice solution either.

 If you are okay with putting it not in the interactive dynflags, then
 that's definitely the easiest solution, but as I am not really happy with
 that myself I'll think about it a bit more and try to come up with a less
 hacky solution.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10857#comment:4>
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