hSetBuffering NoBuffering and getChar don't work properly on Windows

[igloo]

With this program:

import System.IO

main = do { hSetBuffering stdin NoBuffering; run }
run = do { getChar; putStrLn "yes"; run }

if I type

abc<enter>def<enter><control-C>

then:

On Linux and OS X I get the desired output:

$ ./q
ayes
byes
cyes

yes
dyes
eyes
fyes

yes
^Cq: interrupted

In an MSYS window I get:

$ ./q
abc
def

In a cygwin window or a cmd windows I get:

$ ./q
abc
yes
yes
yes
yes
def
yes
yes
yes
yes

and the program doesn't die.

SSHing into cygwin I get:

$ ./q
abc
def

[simonmar]

We already have a ticket for this: #2189