Jsonb: jbvBinary usage in the convertJsonbValue?

I'm little confused by the convertJsonbValue functon at jsonb_utils.c

Maybe I misunderstood something, so I need help =)

>>> if (IsAJsonbScalar(val) || val->type == jbvBinary)

>>>     convertJsonbScalar(buffer, header, val);

As I can see, the convertJsonbScalar function is used for scalar and binary jsonb values. But this function doesn't handle the jbvBinary type.

>>> switch (scalarVal->type)

>>>     case jbvNull:

>>>     ...

>>>     case jbvString:

>>>     ...

>>>     case jbvNumeric:

>>>     .....

>>>     case jbvBool:

>>>     .....

>>>     default:

>>>         elog(ERROR, "invalid jsonb scalar type");

Does this mean, that binary type is incorrect for convertJsonbValue ? Or am I missed something?