From 5c4b3dd47c0af4702db2fcf35065a79258df6744 Mon Sep 17 00:00:00 2001
From: Chris Dams <Chris.Dams@mi.infn.it>
Date: Tue, 4 Apr 2006 15:48:36 +0000
Subject: [PATCH] Bug in power::derivative.

---
 ginac/power.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ginac/power.cpp b/ginac/power.cpp
index 1e9b6849..cd72a629 100644
--- a/ginac/power.cpp
+++ b/ginac/power.cpp
@@ -583,7 +583,7 @@ ex power::conjugate() const
  *  @see ex::diff */
 ex power::derivative(const symbol & s) const
 {
-	if (exponent.info(info_flags::real)) {
+	if (is_a<numeric>(exponent)) {
 		// D(b^r) = r * b^(r-1) * D(b) (faster than the formula below)
 		epvector newseq;
 		newseq.reserve(2);
-- 
2.45.0