patch 8.2.4427: getchar() may return modifiers if no character is available Commit: https://github.com/vim/vim/commit/ad6c45f62558e03d3e3a927b3fe4dbaf30a36bef Author: zeertzjq <zeertzjq@outlook.com> Date: Sun Feb 20 19:05:10 2022 +0000 patch 8.2.4427: getchar() may return modifiers if no character is available Problem: getchar() may return modifiers if no character is available. Solution: Do not process modifiers when there is no character. (closes https://github.com/vim/vim/issues/9806)

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}\")