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waitForProcess fails with "Bad file descriptor"

I am running this small sample program:

int main() { return -1; }

from this Haskell code (both from ghci and compiled):

import System.Process
main = system "a.exe" >> putStrLn "This is not printed"

and get this error

tmp.exe: waitForProcess: invalid argument (Bad file descriptor)

I guess there is a runtime error inside system-call which crashes execution.

I am on Windows 7, ghc 6.12.1. I tried both Cygwin g++ and MSVS cl C++ compilers.

One side question: is there any other way to run external program?

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