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Composer writes debug data into stderr instead of stdout #4034
We were performing a deploy using SaltStack to one of our servers and noted, that composer writes insignificant data into stderr (and some more from the same command to stdout). Composer version is
I think this should not be an intended behaviour.
This is the intended behavior. Relatively standard for unix commands to have only their standard output in stdout and ancillary messages depending on verbosity to stderr. Check the exit code if you want to know if it failed.
#3787 (comment) has more details as to why it has changed.