Hi all,
the problem went away when I switched from 32-bit debian jessie to 64-bit
stretch. One would suspect a bug in some of the system libraries, because
the version of Sage is the same (and compiled locally from source).
Obviously the motivation to find it went down somewhat.
I thank everyone
I have recently built 6.4.1 from sources on three different computers. One
of the compilations crashed while building the ncurses package. I was able
to trace this to a "cd man" command issued during the build process. What
happened was that my cdpath on that machine pointed to a directory whic
