patch 9.0.0841: deletebufline() does not always return 1 on failure Commit: https://github.com/vim/vim/commit/7af3ee2b83545169d78a28ab1cd89aff1127f8b3 Author: zeertzjq <zeertzjq@outlook.com> Date: Sun Nov 6 22:26:05 2022 +0000 patch 9.0.0841: deletebufline() does not always return 1 on failure Problem: deletebufline() does not always return 1 on failure. Solution: Refactor the code to make it work more predictable. (closes https://github.com/vim/vim/issues/11511)

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}\")