When reading from a non-blocking pipe whose buffer is empty, this function
fails with @code{errno} being set to @code{EINVAL} instead of @code{EAGAIN} on
some platforms:
-mingw.
+mingw, MSVC 9.
@end itemize
Portability problems not fixed by Gnulib:
@item
On Windows platforms (excluding Cygwin), this function does not set @code{errno}
upon failure.
+@item
+This function crashes if the stream's file descriptor has already been
+closed, if @code{MSVC_INVALID_PARAMETER_HANDLING} is
+@code{HAIRY_LIBRARY_HANDLING} or @code{SANE_LIBRARY_HANDLING},
+on some platforms:
+MSVC 9.
@end itemize