simplemerge: flush stdout before writing to stderr. Besides, stderr is not always unbuffered under win32 (when redirections occur for instance), and it should be flushed too.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m test -d "1000000 0"
rm .hg/requires
hg tip
echo indoor-pool > .hg/requires
hg tip

true