- Fixed a memory corruption in matrix::determinant_minor().

diff --git a/ginac/matrix.cpp b/ginac/matrix.cpp
index 3e0eeaf84ded4d106b4070856c2ca91020046400..d6091aa4c1b568c18cdcde9f0944160724e4df1e 100644 (file)
--- a/ginac/matrix.cpp
+++ b/ginac/matrix.cpp
@@ -902,7 +902,7 @@ ex matrix::determinant_minor(void) const
                                if (Pkey[fc-1]<fc+c)
                                        break;
                        }
                                if (Pkey[fc-1]<fc+c)
                                        break;
                        }

-                       if (fc<n-c)
+                       if (fc<n-c && fc>0)

                                for (unsigned j=fc; j<n-c; ++j)
                                        Pkey[j] = Pkey[j-1]+1;
                } while(fc);
                                for (unsigned j=fc; j<n-c; ++j)
                                        Pkey[j] = Pkey[j-1]+1;
                } while(fc);