Follow-up Comment #1, bug #49466 (project findutils):
I don't see any reason for xargs to fail here; it doesn't even
see the "2>&1" redirection as the shell is evaluating this.
In effect, this should be identical to
echo a | /usr/local/bin/xargs > /dev/null 2> /dev/null
So the reason could be a bug in your shell, or the file /dev/null
(which is usually a special character device to discard any input,
or still xargs. You could run xargs under investigation of a tool
like 'strace' (which I don't know whether it is available on MacOS)
to see a bit more what happens:
echo a | strace -o xargs.trace /usr/bin/xargs > /dev/null 2>&1 ; echo $?
The output in 'xargs.trace' would be quite interesting.
Thanks & have a nice day,
Berny
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