problem with boost test matrix for serialization related to changes in file system?

From: Robert Ramey (ramey_at_[hidden])
Date: 2020-06-07 21:00:14

I made a few checkins to the serialization library which I had 
previously tested on my working system.  But Now I'm getting some very 
weird errors in the Boost Test matrix:

https://www.boost.org/development/tests/develop/developer/serialization.html

Anyone who has some useful insight would be free to chime in.

According to P Dimov, Filesystem is guilty and i should request help 
from andrey semashev - so here it is.

Robert Ramey