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then > > + exec 8>"${seqres}.cmdtrace" > > + export BASH_XTRACEFD=8 > > + set -x > > + fi > > Hmm ... my experience is that set -x breaks most tests. I ran whole blktests in my test environment with this series and the --cmd-trace option, and observed no new failure. If the bash xtrace feature does not work in any environment, I would like to understand the condition.