patch 8.2.1996: Vim9: invalid error for argument of extend() Commit: https://github.com/vim/vim/commit/193f6201b4d5c76f8dc1faa1dcf369575d93fe3a Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 16 20:08:35 2020 +0100 patch 8.2.1996: Vim9: invalid error for argument of extend() Problem: Vim9: invalid error for argument of extend(). Solution: Check if the type could match. (closes https://github.com/vim/vim/issues/7299)

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}\")