[GHC] #4144: Exception: ToDo: hGetBuf - when using custom handle infrastructure

[GHC]

#4144: Exception: ToDo: hGetBuf - when using custom handle infrastructure
-------------------------------+--------------------------------------------
    Reporter:  AntoineLatter   |       Owner:               
        Type:  bug             |      Status:  new          
    Priority:  normal          |   Component:  Compiler     
     Version:  6.12.3          |    Keywords:               
          Os:  MacOS X         |    Testcase:               
Architecture:  x86_64 (amd64)  |     Failure:  Runtime crash
-------------------------------+--------------------------------------------
 When trying to use the custom handle infrastructure, hGetContents fails
 like so:

 *** Exception: ToDo: hGetBuf

 This exception occurs twice in GHC.IO.Handle.Text

 The handle implementation I'm using is attached.

 It would be neat if I could pass along some witness that my device
 implements RawDevice, then we could just run the same code that we use for
 file-descriptors. But I'd be happy enough with a general solution, as I
 just plan to use this for testing.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4144>
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