subtraction bug

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

This is with the latest CVS version.

grail:/tmp/local> gp
Reading GPRC: /home1/faculty/somos/.gprc ...Done.

                GP/PARI CALCULATOR Version 2.0.18 (development)
                i686 running linux (ix86 kernel) 32-bit version
              (readline v2.2 enabled, extended help not available)
...
parisize = 4000000, primelimit = 500000
gp> y=1+O(x)
%1 = 1 + O(x)
gp> %-%
%2 = O(x)
gp> \q
Good bye!

So far so good. But now try it without y :

grail:/tmp/local> gp
Reading GPRC: /home1/faculty/somos/.gprc ...Done.
...
parisize = 4000000, primelimit = 500000
gp> 1+O(x)
%1 = 1 + O(x)
gp> %-%
  ***   significant pointers are lost in gerepile !!! (please report)

Shalom, Michael