Using debbisect in "reverse"

[Santiago Vila]

Dear mentors:

How would I use debbisect to know when a package *stopped* to ftbfs?

(I already tried several things which did not work)

I'm running bookworm in my test machine but installed devscripts
from trixie as it fixes a subtle bug regarding the sanitization
of date string.

Thanks.

[Santiago Vila]

Ok, I found the way.

In addition to "good" becoming "bad" and "bad" becoming "good"
(because debbisect insist that "bad" has to be older than "good"),
it is enough to use a modified debbisect_buildsrc.sh script
which inverts the exit status, as in the attached patch.

Thanks.

[Santiago Vila]

Post by Santiago Vila
debbisect insist that "bad" has to be older than "good"

I meant the opposite, naturally. debbisect follows the model
that something was working and at some time it broke.

(I guess that's inherited from git bisect)

Thanks.