With debugging enabled (autopkgtest --debug):
alternative-bin-sh PASS autopkgtest: DBG: sending command to testbed: copyup /tmp/autopkgtest.xGweVn/alternative-bin-sh-artifacts/ /tmp/autopkgtest.output.4y26hx9u/artifacts/ tar: unrecognized option '--warning=none'
With debugging enabled (autopkgtest --debug):
alternative-bin-sh PASS t.xGweVn/ alternative- bin-sh- artifacts/ /tmp/autopkgtes t.output. 4y26hx9u/ artifacts/
autopkgtest: DBG: sending command to testbed: copyup /tmp/autopkgtes
tar: unrecognized option '--warning=none'