basic_null_device::read returns 0 but -1 is expected

[Nikolay Shelukhin <nikola-sh@…>]

Documentation:

basic_null_device::read
"Returns -1. Enabled if Mode refines input."

Code:

template<typename Ch, typename Mode>
class basic_null_device {
public:
    ...
    std::streamsize read(Ch*, std::streamsize) { return 0; }
    ...

[Edward Diener]

This has been fixed in the current 'develop' branch.