XML test error on Arch Linux

Hello hackers,

i compile postgresql just for fun.
My system is a Arch Linux.
I get after upgrade the libxml2 package (from 2.12.7-1 to 2.13.1-1) test errors for xml:

---
...
ok 200       + largeobject                               553 ms
ok 201       + with                                      819 ms
not ok 202   + xml                                      1464 ms
# parallel group (15 tests):  hash_part predicate partition_info explain reloptions memoize compression partition_merge
statspartition_split partition_aggregate tuplesort partition_join partition_prune indexing 
ok 203       + partition_merge                          1282 ms
ok 204       + partition_split                          1533 ms
ok 205       + partition_join                           2229 ms
...
ok 221       - fast_default                              230 ms
ok 222       - tablespace                                498 ms
1..222
# 1 of 222 tests failed.
# The differences that caused some tests to fail can be viewed in the file
"/home/frastr/devel/postgresql/src/test/regress/regression.diffs".
# A copy of the test summary that you see above is saved in the file
"/home/frastr/devel/postgresql/src/test/regress/regression.out".
make[1]: *** [GNUmakefile:118: check] Fehler 1
make[1]: Verzeichnis „/home/frastr/devel/postgresql/src/test/regress“ wird verlassen
make: *** [GNUmakefile:69: check] Fehler 2
---

What can I do?
Who can help?

Best regards,
Frank