#5478: GHC panics - Can't derive Show for primitive type ByteArray#
---------------------------------+------------------------------------------
Reporter: hvr | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.2.1 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Compile-time crash
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The following Haskell
{{{
#!hs
{-# LANGUAGE MagicHash #-}
import GHC.Exts
data Foo = Foo0 ByteArray#
deriving Show
main = return ()
}}}
caused GHC to panic with
{{{
[1 of 1] Compiling Main ( ticket_5478.hs, ticket_5478.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.2.1 for x86_64-unknown-linux):
Error in deriving:
Can't derive Show for primitive type ghc-prim:GHC.Prim.ByteArray#{(w)
tc 3f}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5478>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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