Index: lucene/src/java/org/apache/lucene/index/SegmentReader.java
===================================================================
--- lucene/src/java/org/apache/lucene/index/SegmentReader.java	(revision 1238775)
+++ lucene/src/java/org/apache/lucene/index/SegmentReader.java	(working copy)
@@ -114,6 +114,7 @@
 
   @Override
   public FieldInfos getFieldInfos() {
+    ensureOpen();
     return core.fieldInfos;
   }
 
Index: lucene/src/java/org/apache/lucene/index/SlowCompositeReaderWrapper.java
===================================================================
--- lucene/src/java/org/apache/lucene/index/SlowCompositeReaderWrapper.java	(revision 1238775)
+++ lucene/src/java/org/apache/lucene/index/SlowCompositeReaderWrapper.java	(working copy)
@@ -85,6 +85,7 @@
   @Override
   public Fields fields() throws IOException {
     ensureOpen();
+    in.ensureOpen(); // as we cached the fields, we better check the original reader
     return fields;
   }
 
@@ -133,6 +134,7 @@
   @Override
   public Bits getLiveDocs() {
     ensureOpen();
+    in.ensureOpen(); // as we cached the liveDocs, we better check the original reader
     return liveDocs;
   }
 
@@ -145,6 +147,7 @@
   @Override
   public boolean hasDeletions() {
     ensureOpen();
+    in.ensureOpen(); // as we cached the liveDocs, we better check the original reader
     return liveDocs != null;
   }