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After this commit, > nbd-server prints messages to stderr after daemonization. This caused > nbd test cases to fail due to unexpected stderr output. [...] > To avoid the failures, redirect nbd-server stderr to .full files. > > Link: https://github.com/NetworkBlockDevice/nbd/commit/da5e07c057ab > Signed-off-by: Shin'ichiro Kawasaki FYI, I applied the patch.