[GHC] #7583: IO reordering

15 Jan 2013

      #7583: IO reordering
----------------------------------------+-----------------------------------
Reporter:  Heimdell                     |          Owner:                              
    Type:  bug                          |         Status:  new                         
Priority:  normal                       |      Component:  Compiler                    
 Version:  7.4.1                        |       Keywords:  IO, invalid evaluation order
      Os:  Linux                        |   Architecture:  x86_64 (amd64)              
 Failure:  Incorrect result at runtime  |      Blockedby:                              
Blocking:                               |        Related:                              
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 I have a simple test program:

 {{{
 main = do putStr "> "
           line <- getLine
           putStrLn line
 }}}

 In ghci, it writes "> " before receiving input:

 {{{
 Prelude Main> main
...
WHAT
 WHAT
 }}}
But being compiled by ghc it writes "> " just after receiving input.

 {{{
 maelstrom@ubuntu:~/vault$ ./test
 WHAT
...
WHAT
 }}}
That is not the behavior I expect.

-- 
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7583
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