commit https://github.com/vim/vim/commit/ae8eb3ca927f1b0ac2a6643da8699538cdc380f6 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 21:59:26 2016 +0100 patch 7.4.1288 Problem: ch_sendexpr() does not use JS encoding. Solution: Use the encoding that fits the channel mode. Refuse using ch_sendexpr() on a raw channel.

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}\")