233     Expected<size_t> ReadBytes = sys::fs::readNativeFile(  in getMemoryBufferForStream()  local
235     if (!ReadBytes)  in getMemoryBufferForStream()
236       return errorToErrorCode(ReadBytes.takeError());  in getMemoryBufferForStream()
237     if (*ReadBytes == 0)  in getMemoryBufferForStream()
239     Buffer.set_size(Buffer.size() + *ReadBytes);  in getMemoryBufferForStream()
487     Expected<size_t> ReadBytes =  in getOpenFileImpl()  local
489     if (!ReadBytes)  in getOpenFileImpl()
490       return errorToErrorCode(ReadBytes.takeError());  in getOpenFileImpl()
491     if (*ReadBytes == 0) {  in getOpenFileImpl()
495     ToRead = ToRead.drop_front(*ReadBytes);  in getOpenFileImpl()
496     Offset += *ReadBytes;  in getOpenFileImpl()