asinh(x).rewrite(log).series(x, x0=I*oo) is nan

[skirpichev]

should be

In [1]: asinh(x).rewrite(log).series(x, x0=I*oo)
Out[1]: 
    3      1     ⅈ⋅π                         ⎛1          ⎞
- ───── + ──── + ─── + log(2) + log(-ⅈ⋅x) + O⎜──; x → ∞⋅ⅈ⎟
      4      2    2                          ⎜ 6         ⎟
  32⋅x    4⋅x                                ⎝x          ⎠

See also #1230.