Dear Gap Forum,

Jean Michel wrote

I have found, maybe not a bug, but at least an oddity in GAP3.4.4
as the following log illustrates:

gap>  q:=X(CF(1));q.name:="q";Factors(q^2-1);
X(Rationals)
"q"
[ q - 1, q + 1 ]
gap>  q:=X(CF(2));q.name:="q";Factors(q^2-1);
X(CF(1))
"q"
Error, sorry, can not factor <r> in the ring <R> in
R.operations.Factors( R, r ) called from
Factors( q ^ 2 - 1 ) called from
main loop
brk>

Indeed this is a strange behaviour.
It will be corrected together with the next bug fixes.
Thanks for this report.

Kind regards
Thomas Breuer