julia

3be9f109 - implement LibuvStream interface for BufferStream (#35545)

implement LibuvStream interface for BufferStream (#35545) It is noted as a non-OS stream, but has also been a subtype of LibuvStream since forever. #32309 did not add the `readerror` field. (cherry picked from commit de042102d7d607d19224600ca4a990cdf3cf67dc)