10.05.2020 5:52, Mario Lobo wrote:

> The command:
> 
> svn diff https://svn.freebsd.org/base/stable/11@359971
> https://svn.freebsd.org/base/stable/11@360676
> 
> yielded a 170 Mbytes file!!
> 
> It will be like looking for a needle in a haystack, in the dark, with just
> a hunch of where the needle was dropped.
> 
> Well ... at least I have the haystack.
> 
> Thanks everyone for the tips!

You don't really need to study source code to bisect the problem,
just use "svnlite update -rZZZZZ" to move your source tree to the middle point
between known working and non-working revisions. Then rebuild and reinstall
kernel and world, reboot and re-do the test. If it works, you get new (higher)
working revision and if not, you get new (lower) non-working one.

Repeat until you have only single revision between working and non-working.
This procedure takes time and effort but this is not like looking for a needle 
in a haystack, much easier.
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