[GHC] #8281: The impossible happened: primRepToFFIType

[GHC]

#8281: The impossible happened: primRepToFFIType
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        Reporter:  tibbe             |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  7.6.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash                              |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by winter):

 Replying to [comment:24 bgamari]:
 > > what is stopping GHCi supporting unsafe FFI calls?
 >
 > If I understand Simon correctly, the answer is probably "nothing".
 However, it's more a question of whether we want to change the semantics
 of "unsafe" foreign calls (something which would require the involvement
 of the Haskell Prime committee, if to be done properly). I can see the
 argument for `unsafe` not placing any new obligations on the compiler and
 think there's little reason to push for such a change.
 >
 > I do think, however, that it is important that we have a `unsafenogc`
 call type for the reason you describe.


 That's a reasonable solution. But as simon pointed out, we're too vague on
 `unsafe` FFI calls before, it's not a big deal to give a more clear
 semantics, is it? After all we have been relying that semantics for years,
 it's more costly to add new FFI keyword and change all the libraries.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8281#comment:25>
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