Add nil guard for binding

v2/internal/binding/binding.go

@@ -25,6 +25,9 @@ func NewBindings(logger *logger.Logger, structPointersToBind []interface{}, exem
 	}
 
 	for _, exemption := range exemptions {
+		if exemptions == nil {
+			continue
+		}
 		name := runtime.FuncForPC(reflect.ValueOf(exemption).Pointer()).Name()
 		// Yuk yuk yuk! Is there a better way?
 		name = strings.TrimSuffix(name, "-fm")