- added some asserts

diff --git a/snapper/Snapper.cc b/snapper/Snapper.cc
index 1fbed5a966469bcf844c0e99c8eeea23efdf695f..b5917f8d46cdd95cfc37719c276bea7c1576cefd 100644 (file)
--- a/snapper/Snapper.cc
+++ b/snapper/Snapper.cc
@@ -72,6 +72,8 @@ namespace snapper
     Snapshots::iterator
     Snapper::createPostSnapshot(Snapshots::const_iterator pre)
     {
+       assert(pre != snapshots.end());
+
        return snapshots.createPostSnapshot(pre);
     }
 
@@ -80,6 +82,8 @@ namespace snapper
     Snapper::startBackgroundComparsion(Snapshots::const_iterator snapshot1,
                                       Snapshots::const_iterator snapshot2)
     {
+       assert(snapshot1 != snapshots.end() && snapshot2 != snapshots.end());
+
        y2mil("num1:" << snapshot1->getNum() << " num2:" << snapshot2->getNum());
 
        string dir1 = snapshot1->snapshotDir();
@@ -96,6 +100,8 @@ namespace snapper
     Snapper::setComparisonNums(Snapshots::const_iterator new_snapshot1,
                               Snapshots::const_iterator new_snapshot2)
     {
+       assert(new_snapshot1 != snapshots.end() && new_snapshot2 != snapshots.end());
+
        y2mil("num1:" << new_snapshot1->getNum() << " num2:" << new_snapshot2->getNum());
 
        snapshot1 = new_snapshot1;