Re: Regression testing breakthrough

[Dmitry Timoshkov]

Austin English  wrote:
> > 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

How do you know that $SHA1SUM without a regression test?