--- a/unittests/ADT/SCCIteratorTest.cpp	Thu Dec 12 15:22:36 2013 +0900
+++ b/unittests/ADT/SCCIteratorTest.cpp	Mon Sep 08 22:06:00 2014 +0900
@@ -213,7 +213,7 @@
           // Return a pointer to it.
           return FirstNode + i;
       assert(false && "Dereferencing end iterator!");
-      return 0; // Avoid compiler warning.
+      return nullptr; // Avoid compiler warning.
     }
   };
 
@@ -277,7 +277,7 @@
     GT::NodeSubset NodesInSomeSCC;
 
     for (scc_iterator<GT> I = scc_begin(G), E = scc_end(G); I != E; ++I) {
-      std::vector<GT::NodeType*> &SCC = *I;
+      const std::vector<GT::NodeType *> &SCC = *I;
 
       // Get the nodes in this SCC as a NodeSubset rather than a vector.
       GT::NodeSubset NodesInThisSCC;