commit https://github.com/vim/vim/commit/155500077c80cdb5d9c63996000c011b66a676bf Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 31 18:45:24 2016 +0100 patch 7.4.1228 Problem: copy() and deepcopy() fail with special variables. (Nikolai Pavlov) Solution: Make it work. Add a test. Closes https://github.com/vim/vim/issues/614.

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}\")