Peter Baumgarten writes:

> The OS was Fedora 21 x86_64, attached is the log

This looks similar to this bug report:
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19780

Failures there are also caused by segfaults and the OS is CentOS 7,
which is rather close to a recent Fedora.

~~ Ricardo