agm() problem

[Igor Schein <igor@txc.com>]

Hi,

? agm(x+1,x+2)
  ***   the PARI stack overflows !
  current stack size: 16000000 (15.259 Mbytes)
  [hint] you can increase GP stack with allocatemem()

I expect to see

{
1.456791031046906869186432383 + 1.031000135092528011772951687*x - 
0.02305964913093473786771337682*x^2 +
0.01774284964603242949633670730*x^3 -
0.01407433547765049747812471295*x^4 +
0.01146609775485052540536969410*x^5 -
0.009557186996535211365420684874*x^6 +
0.008121608467307648280484312568*x^7 -
0.007014827623246549539873931055*x^8 +
0.006142319337199462565075547877*x^9 -
0.005440826708694701775712050461*x^10 +
0.004867027537997501085267069056*x^11 -
0.004390570047176240328253283861*x^12 +
0.003989719515941499838189347089*x^13 -
0.003648587342450842517914920070*x^14 +
0.003355333878726730546651374393*x^15 + O(x^16) 
}

with seriesprecision = 16 and realprecision = 28.

Thanks

Igor