X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fpseries.cpp;h=1e61e0aee18b8066eea85bf1360572a3b3d86074;hp=0e1f183322c47114404c1c4c7b502f6cc44d68f4;hb=d0b3e67ddbbe031fefbe3e88e8bf8860424d0d4b;hpb=04aace56d3d2ca82be59460bf1922600ae43449a

diff --git a/ginac/pseries.cpp b/ginac/pseries.cpp
index 0e1f1833..1e61e0ae 100644
--- a/ginac/pseries.cpp
+++ b/ginac/pseries.cpp
@@ -1100,7 +1100,10 @@ ex power::series(const relational & r, int order, unsigned options) const
 	}
 	const ex& sym = r.lhs();
 	// find existing minimal degree
-	int real_ldegree = basis.expand().ldegree(sym-r.rhs());
+	ex eb = basis.expand();
+	int real_ldegree = 0;
+	if (eb.info(info_flags::rational_function))
+		real_ldegree = eb.ldegree(sym-r.rhs());
 	if (real_ldegree == 0) {
 		int orderloop = 0;
 		do {