regression test failure on abstime

Trying a new 7.1.2 installation when running gmake check I get a failure at the abstime test. The regression.diffs file contains the following:

*** ./expected/abstime.out Thu May 3 15:00:37 2001
--- ./results/abstime.out Fri Jul 20 11:12:54 2001
***************
*** 47,56 ****
| Sun Jan 14 03:14:21 1973 PST
| Mon May 01 00:30:30 1995 PDT
| epoch
- | current
| -infinity
| Sat May 10 23:59:12 1947 PST
! (6 rows)

SELECT '' AS six, ABSTIME_TBL.*
WHERE ABSTIME_TBL.f1 > abstime '-infinity';
--- 47,55 ----
| Sun Jan 14 03:14:21 1973 PST
| Mon May 01 00:30:30 1995 PDT
| epoch
| -infinity
| Sat May 10 23:59:12 1947 PST
! (5 rows)

SELECT '' AS six, ABSTIME_TBL.*
WHERE ABSTIME_TBL.f1 > abstime '-infinity';

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Hints what's wrong?

TIA,
thalis