I wonder if this is related to this bug report.
If so there's mention (and links) there of some "RPM based distro's" having upstream fixes.
Perhaps there's something there of use to you.

Otherwise, all I can think of trying is to run 'perl -Mblib t/map.t' and see if that presents any useful info.
You could even hack at t/map8.t (by inserting some print() debug statements) such that you pinpoint the precise location of code therein that's causing a crash.

Cheers,
Rob