Regression testing breakthrough

Austin English austinenglish at
Tue Oct 18 12:24:47 CDT 2011

On Tue, Oct 18, 2011 at 09:01, Dmitry Timoshkov <dmitry at> wrote:
> Damjan Jovanovic <damjan.jov at> wrote:
>> > Moreover, often users get asked 'does reverting commit xxxx' help? Without
>> > performing a proper regression test it's impossible to asnwer that
>> > question.
>> >
>> >
>> Reverting a commit in the latest git is just 1 round of
>> patch+configure+make+run, and reverting to the commit before it in the
>> binary repository is just one git command. Why would you need a "proper
>> regression test"?
> Reverting a patch in latest git is not always possible, instead it's
> a very useful test to revert the patch at the suspected regression point
> and see if that really helps.

That still doesn't require a full regression test, just:
$ git checkout -f $SHA1SUM
$ ./configure && make -j4
# test
$ git show $SHA1SUM | patch -p1 -R
$ ./configure && make -j4
# retest


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