commit https://github.com/vim/vim/commit/af7559f66603075e9b4d39d873b2161ea3ec8492 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 20 21:48:25 2016 +0100 patch 7.4.1374 Problem: Channel test hangs on MS-Windows. Solution: Disable the ch_read() that is supposed to time out.

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")