#10517: Unexpected behavior of unsafeCoerce converting Word32 to Word8 -------------------------------------+------------------------------------- Reporter: svenk | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Keywords: | Operating System: Linux Architecture: x86_64 | Type of failure: Incorrect result (amd64) | at runtime Test Case: | Blocked By: Blocking: | Related Tickets: Differential Revisions: | -------------------------------------+------------------------------------- The function `unsafeCoerce` behaves unexpected if it is used to convert `Word32` to `Word8`: {{{#!hs main = do -- prints 135 print (fromIntegral (1234567 :: Word32) :: Word8) -- prints 1234567 print (unsafeCoerce (1234567 :: Word32) :: Word8) }}} On the other hand coercing `Ptr Word32` to `Ptr Word8` or the other way around works perfectly fine. -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10517> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler