polred() problem

[Igor Schein <igor@txc.com>]

Hi,

The output of the following command:

polred(polcompositum(x^42+245*x^28+2499*x^14+7,quadpoly(-4))[1])

is a vector of polynomials of degree strictly less than 84.  I've
never seen it before, must be a bug.  

This is of course using unstable version, the stable one can't handle
this input at all in reasonable time. 

Thanks

Igor