Bug#750358: libmarpa-r2-perl: FTBFS on s390x: multiple tests segfault

[Aaron M. Ucko]

Source: libmarpa-r2-perl
Version: 2.084000~dfsg-1
Severity: important
Justification: fails to build from source

The s390x build of libmarpa-r2-perl failed because a number of tests
segfaulted; FWIW, the log at

https://buildd.debian.org/status/fetch.php?pkg=libmarpa-r2-perl&arch=s390x&ver=2.084000~dfsg-1&stamp=1401473766

also contains multiple "Attempt to free unreferenced scalar" reports.

The build log additionally contains warnings about truncating conversions,
but none appear to be a problem in practice on other 64-bit platforms, so
either that's a red herring or they're less sensitive to such bugs.

Could you please take a look?

Thanks!