#3808: piping binary files sometimes fail
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Reporter: paolino | Owner: simonmar
Type: bug | Status: assigned
Priority: high | Milestone: 6.12.2
Component: Compiler | Version: 6.12.1
Keywords: pipe binary IO | Difficulty:
Os: Linux | Testcase:
Architecture: x86_64 (amd64) | Failure: Runtime crash
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Comment(by paolino):
Replying to [comment:3 simonmar]:
> `Data.ByteString.Lazy.hGetContents` calls `hIsEOF` which calls
`hLookAhead`, and `hLookAhead` reads the next `Char` from the `Handle`,
which does Unicode decoding. Putting `stdin` into binary mode fixes the
problem.
>
In the program revealing the error, putting stdin in binary mode was not
fixing. It is my fault that I coldn't reproduce that behaviour in the
given example, which indeed is fixed by this setting.
> After giving this a bit of thought, I think the best solution is to make
`hIsEOF` not do any decoding, so I'll look into doing that.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3808#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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