[GiNaC-list] ldegree changes after expand

Dear All, I've just hit an unexpected behavior of the ex.ldegree() method in my application. The problem is that ldegree() gives 0 before and 1 (the expected value) after calling expand() on the expression. I did not expect this, as the tutorial says that degree() and ldegree() "work reliably on non-expanded input polynomials". A small running example and its output are attached. The expression is the one I encountered in my application. This looks like a bug to me, or is it necessary to call expand() before using ldegree()? A related question: What about coeff(), should I call expand() before using coeff()? GiNaC version: 1.7.4 g++ version: 7.3.1 openSUSE (tumbleweed) Thanks in advance for any help on these questions Matthias