Package: pari
Version: 2.8.0 (development 17461-35aeab5)

Using input from bug #627:

? zeta(0E1)
  ***   at top-level: zeta(0E1)
  ***                 ^---------
  *** zeta: domain error in zeta: argument = 1

in contrast to:

? zeta(0)
-0.50000000000000000000000000000000000000

even though the 2 values are the same:

? 0-1==0E1-1
1

Thanks

Igor