patch 8.0.0352: not easy to see when a typval needs to be cleared commit https://github.com/vim/vim/commit/f06e5a549f42396be3478ccc1b5f03be64e1173e Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 23 14:25:17 2017 +0100 patch 8.0.0352: not easy to see when a typval needs to be cleared Problem: The condition for when a typval needs to be cleared is too complicated. Solution: Init the type to VAR_UNKNOWN and clear it always.

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}\")