patch 8.0.1708: mkdir with 'p' flag fails on existing directory commit https://github.com/vim/vim/commit/78a16b0f2a142aae1fdc96c50ab0f25194d0e755 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 14 13:51:55 2018 +0200 patch 8.0.1708: mkdir with 'p' flag fails on existing directory Problem: Mkdir with 'p' flag fails on existing directory, which is different from the mkdir shell command. Solution: Don't fail if the directory already exists. (James McCoy, closes #2775)

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}\")