r176333 - Add one more sanity check in SourceManager::getFileIDLoaded().

[Argyrios Kyrtzidis]

Author: akirtzidis
Date: Thu Feb 28 21:43:33 2013
New Revision: 176333

URL: http://llvm.org/viewvc/llvm-project?rev=176333&view=rev
Log:
Add one more sanity check in SourceManager::getFileIDLoaded().

Modified:
    cfe/trunk/lib/Basic/SourceManager.cpp

Modified: cfe/trunk/lib/Basic/SourceManager.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/SourceManager.cpp?rev=176333&r1=176332&r2=176333&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/SourceManager.cpp (original)
+++ cfe/trunk/lib/Basic/SourceManager.cpp Thu Feb 28 21:43:33 2013
@@ -863,6 +863,11 @@ FileID SourceManager::getFileIDLoaded(un
       return Res;
     }
 
+    // Sanity checking, otherwise a bug may lead to hanging in release build.
+    if (LessIndex == MiddleIndex) {
+      assert(0 && "binary search missed the entry");
+      return FileID();
+    }
     LessIndex = MiddleIndex;
   }
 }