From ba0fa799375b03d3e8d512b0a6b2b6f1ef14e6e5 Mon Sep 17 00:00:00 2001
From: Richard Kreckel <Richard.Kreckel@uni-mainz.de>
Date: Tue, 29 Aug 2000 02:30:03 +0000
Subject: [PATCH] - Fixed a memory corruption in matrix::determinant_minor().

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

diff --git a/ginac/matrix.cpp b/ginac/matrix.cpp
index 3e0eeaf8..d6091aa4 100644
--- 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 (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);
-- 
2.47.0