* Some internal reorganization WRT flyweight handling and initialization,

[ginac.git] / ginac / idx.cpp

diff --git a/ginac/idx.cpp b/ginac/idx.cpp
index 9017a9cae95876e1d30146fdf2bcd9024a32086c..d0388d237fcdd9cdf5e6be3c857c0c7c1cd76b08 100644 (file)
--- a/ginac/idx.cpp
+++ b/ginac/idx.cpp
@@ -387,7 +387,7 @@ ex idx::subs(const lst & ls, const lst & lr, bool no_pattern) const
  *  @see ex::diff */
 ex idx::derivative(const symbol & s) const
 {
-       return _ex0();
+       return _ex0;
 }
 
 //////////