add a fixme

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77447 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/BugReporter.cpp b/lib/Analysis/BugReporter.cpp
index 5640c31..f00583e 100644
--- a/lib/Analysis/BugReporter.cpp
+++ b/lib/Analysis/BugReporter.cpp
@@ -1317,8 +1317,10 @@
       FlushReport(EQ);
     }
     
-    // Delete the BugType object.  This will also delete the equivalence
-    // classes.
+    // Delete the BugType object.  
+
+    // FIXME: this will *not* delete the BugReportEquivClasses, since FoldingSet
+    // only deletes the buckets, not the nodes themselves.
     delete BT;
   }