+#if defined(mingw32_HOST_OS)
+ do
+ -- The win32 Console API mutates the first character of
+ -- type-ahead when reading from it in a non-buffered manner. Work
+ -- around this by flushing the input buffer of type-ahead characters,
+ -- but only if stdin is available.
+ flushed <- io (IO.try (GHC.ConsoleHandler.flushConsole stdin))
+ case flushed of
+ Left err | isDoesNotExistError err -> return ()
+ | otherwise -> io (ioError err)
+ Right () -> return ()
+#endif