Ticket #1021 (new defect)

Description

Here is a small problem I encountered with BzipInput. Code like the following always throws BzipClosedException, since BzipInput.read() calls kill_bzs() on a last chunk of data (BzipStream.d:250), and on the next call check_valid() throws the exception (BzipStream.d:327). ZlibInput is different - it returns Eof instead of calling check_valid() (ZlibStream.d:139-140).

auto z = new BzipInput(f);
uint len = 0;
auto con = out.conduit;
auto tmp = new byte [con.bufferSize];
try {
    while( len != IConduit.Eof ) {
        len = z.read(tmp);
    }
} catch( BzipClosedException ex) {
    Cout(ex.toString).newline.flush;
}