Patch by Stefan Weinzierl that fixes a bug in series expansion.

[ginac.git] / ginac / tensor.cpp

diff --git a/ginac/tensor.cpp b/ginac/tensor.cpp
index c215237d85f9d1225913b7fff4f87e59e0bc8134..3de3a959043b22d3ac35897f904624462c98d7cd 100644 (file)
--- a/ginac/tensor.cpp
+++ b/ginac/tensor.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's special tensors. */
 
 /*
- *  GiNaC Copyright (C) 1999-2006 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2007 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -395,6 +395,8 @@ bool tensor::replace_contr_index(exvector::iterator self, exvector::iterator oth
 again:
        if (self_idx->is_symbolic()) {
                for (size_t i=1; i<other->nops(); i++) {
+                       if (! is_a<idx>(other->op(i)))
+                               continue;
                        const idx &other_idx = ex_to<idx>(other->op(i));
                        if (is_dummy_pair(*self_idx, other_idx)) {