power series bug?

[Michael Somos <somos@grail.cba.csuohio.edu>]

                GP/PARI CALCULATOR Version 2.0.18 (development)
                i686 running linux (ix86 kernel) 32-bit version
...
parisize = 4000000, primelimit = 500000
gp> for(n=1,12,print(n" "(1+O(t))*x^n * (1+O(t))*x^n ))
1 (1 + O(t))*x^2
2 (1 + O(t))*x^4
3 (1 + O(t))*x^6
4 (1 + O(t))*x^8
5 (1 + O(t))*x^10
6 (1 + O(t))*x^12
7 (1 + O(t))*x^14
8 (1 + O(t))*x^16
9 (1 + O(t))*x^18 + O(t)*x^13
10 (1 + O(t))*x^20 + O(t)*x^14
11 (1 + O(t))*x^22 + O(t)*x^16
12 (1 + O(t))*x^24 + O(t)*x^17

This looks like a bug to me. The 1.39 version did not do this. Shalom, Michael

-- 
Michael Somos <somos@grail.cba.csuohio.edu>     Cleveland State University
http://grail.cba.csuohio.edu/~somos/            Cleveland, Ohio, USA 44115