Unreliability of the build system

[Jan Stolarek]

> My only claim was that I have a set of steps that can reliably reproduce
> an error on my system, not that these steps will reliably reproduce it
> on an arbitrary system, e.g., yours. Still, being able to reliably
> reproduce an error, even if only on one system, is *very* useful.
 just misunderstood your use of the word "reliable". Certainly having this level of 
reproducibility is very helpful in debugging, even if it's only on one machine.

> So, to be clear, you see recache errors sporadically and for different
> sets of tests across different runs, and you are running validate with
> no extra arguments, single-threaded, on a Linux x86_64 system with an
> ext4 file system?
Yes, except I would say "very often" instead of "sporadically". I'm not sure about 
single-threaded. I run validate without any parameters - doesn't it use more then one thread in 
this case?

Jan