generalized_series_solutions() fails with some recurrences

[mezzarobba]

(Might try fixing it myself someday, but not now.)

sage: Pol.<z> = QQ[]
sage: Rec.<Sz> = OreAlgebra(Pol)
sage: rec = (-25165779*z^3 - 1031796939*z^2 - 14092836240*z - 64122404892)*Sz^13 + (1702884379*z^3 + 652213105
....: 75*z^2 + 835034101592*z + 3573825830162)*Sz^12 + (-22196217078*z^3 - 871105051492*z^2 - 11362215001012*z
....:  - 49294576910526)*Sz^11 + (108363844374*z^3 + 4401360529612*z^2 + 59150888473364*z + 263562562419066)*S
....: z^10 + (-197744302789*z^3 - 8602728613511*z^2 - 121160273897408*z - 556950616254958)*Sz^9 + (20375892397
....: *z^3 + 3501356775235*z^2 + 74072014386184*z + 418316114610808)*Sz^8 + (350408306796*z^3 + 9333484115520*
....: z^2 + 72659777977448*z + 140897660149620)*Sz^7 + (-350408306796*z^3 - 11691014292240*z^2 - 1198103815118
....: 48*z - 382170707559340)*Sz^6 + (-20375892397*z^3 + 2278803231415*z^2 + 41531185746816*z + 17441139780512
....: 8)*Sz^5 + (197744302789*z^3 + 3261929553829*z^2 + 14344292703768*z + 7117838600802)*Sz^4 + (-10836384437
....: 4*z^3 - 2100470132828*z^2 - 13133080537684*z - 25821750195414)*Sz^3 + (22196217078*z^3 + 460667973188*z^
....: 2 + 3153473434932*z + 7077439136914)*Sz^2 + (-1702884379*z^3 - 36951752165*z^2 - 269642933392*z - 661407
....: 003678)*Sz + 25165779*z^3 + 478149801*z^2 + 3019893480*z + 6341776308
sage: rec.generalized_series_solutions()
---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
<ipython-input-5-1e6f1da48059> in <module>
----> 1 rec.generalized_series_solutions()

~/docs/code/sage/ore_algebra/ore_algebra/src/ore_algebra/ore_operator_1_1.py in generalized_series_solutions(self, n, dominant_only, real_only, infolevel)
   4486                             while killer.is_zero():
   4487                                 dl += 1
-> 4488                                 adjustment = operator_applied_to_term(k, l + dl)
   4489                                 killer = adjustment[l + dl][ram*prec - degdrop - k]
   4490                             # update solution

~/docs/code/sage/ore_algebra/ore_algebra/src/ore_algebra/ore_operator_1_1.py in operator_applied_to_term(k, l)
   4458                             if i != l and j == 0: # [log(n)^i] log(n)^l
   4459                                 continue
-> 4460                             contrib += ((coeffs[j]*log_tails[j][l - i]).shift(-ram*prec)* \
   4461                                         (poly_tails[j][k]*spoly_tails[j]).shift(-ram*prec)).shift(-ram*prec - k)
   4462                         out.append(_binomial(l, i)*contrib)

IndexError: list index out of range