commit https://github.com/vim/vim/commit/c4dcd60c76666bf113719f929709ad6120eb6528 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 26 22:56:46 2016 +0100 patch 7.4.1662 Problem: No test for an invalid Ex command on a channel. Solution: Test handling an invalid command gracefully. Avoid getting an error message, do write it to the channel log.

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}\")