Problem with handles in GHC from CVS

[Krasimir Angelov]

Cabal uses something like system "ghc --version >tmp" in order to
determine the version of GHC. After the last changes in CVS the above
line no longer produces the right result. The temporary file is
created but it is empty. It seems like the stdout/stderr handles are
flushed in GHC.TopHandler.runMainIO but only if the program terminates
without exception. I tried to flush handles in the catch clause but
this doesn't help. Any ideas?

Cheers,
   Krasimir