From 682a01c83b245ddff2139e5d7777c89cb660510c Mon Sep 17 00:00:00 2001
From: Martin Odersky <odersky@gmail.com>
Date: Fri, 20 Nov 2009 18:02:42 +0000
Subject: Closed #2641

---
 src/compiler/scala/tools/nsc/symtab/Types.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/compiler/scala/tools/nsc/symtab/Types.scala b/src/compiler/scala/tools/nsc/symtab/Types.scala
index 1dad1f1272..ed0f73f0ad 100644
--- a/src/compiler/scala/tools/nsc/symtab/Types.scala
+++ b/src/compiler/scala/tools/nsc/symtab/Types.scala
@@ -1564,6 +1564,8 @@ A type's typeSymbol should never be inspected directly.
         parentsPeriod = currentPeriod
         if (!isValidForBaseClasses(period)) {
           parentsCache = thisInfo.parents map transform
+        } else if (parentsCache == null) { // seems this can happen if things are currupted enough, see #2641
+          parentsCache = List(AnyClass.tpe)
         }
       }
       parentsCache
-- 
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