[ ghc-Bugs-1069656 ] ghc-ghci inconsisteny

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Bugs item #1069656, was opened at 2004-11-19 19:57
Message generated for change (Settings changed) made by simonmar
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Category: None
Group: None
>Status: Closed
Resolution: None
Priority: 5
Submitted By: Nightmare (goronsf)
Assigned to: Nobody/Anonymous (nobody)
Summary: ghc-ghci inconsisteny

Initial Comment:
The following program has different semantics in ghc
and ghci. 

main = do putStrLn "something"
                  putStr "something else" 

It's the linebuffering. NoLineBuffering should be used
on expressions without side-effects. 

So 5*5 should print immediately, and do putStrLn
"something" should behave the same in both
applications. How doesn't matter that much to me, but
they should be the same. 

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>Comment By: Simon Marlow (simonmar)
Date: 2004-11-22 13:30

Message:
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user_id=48280

Buffering of the standard handles does indeed differ in GHCi 
compared to GHC.  The behaviour is a compromise: you don't 
want NoBuffering by default for stdout in a compiled program, 
because it would be too slow.  You probably *do* want 
NoBuffering in an interactive environment, however, because 
you want interactivity.

So, unless we hear from lots of people who want this to 
change, it'll stay as is.

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