--- a/jdk/src/share/classes/com/sun/java/util/jar/pack/BandStructure.java	Tue Oct 16 12:29:10 2012 -0700
+++ b/jdk/src/share/classes/com/sun/java/util/jar/pack/BandStructure.java	Tue Oct 16 12:35:22 2012 -0700
@@ -1000,7 +1000,6 @@
 
         /** Write a constant pool reference. */
         public void putRef(Entry e) {
-            assert(index != null);
             addValue(encodeRefOrNull(e, index));
         }
         public void putRef(Entry e, Index index) {
@@ -1052,6 +1051,8 @@
 
 
     int encodeRef(Entry e, Index ix) {
+        if (ix == null)
+            throw new RuntimeException("null index for " + e.stringValue());
         int coding = ix.indexOf(e);
         if (verbose > 2)
             Utils.log.fine("putRef "+coding+" => "+e);

--- a/jdk/src/share/classes/com/sun/java/util/jar/pack/ConstantPool.java	Tue Oct 16 12:29:10 2012 -0700
+++ b/jdk/src/share/classes/com/sun/java/util/jar/pack/ConstantPool.java	Tue Oct 16 12:35:22 2012 -0700
@@ -1381,6 +1381,8 @@
 
         /** Index of all CP entries of a given tag and class. */
         public Index getMemberIndex(byte tag, ClassEntry classRef) {
+            if (classRef == null)
+                throw new RuntimeException("missing class reference for " + tagName(tag));
             if (indexByTagAndClass == null)
                 indexByTagAndClass = new Index[CONSTANT_Limit][];
             Index allClasses =  getIndexByTag(CONSTANT_Class);

--- a/jdk/src/share/native/com/sun/java/util/jar/pack/bands.cpp	Tue Oct 16 12:29:10 2012 -0700
+++ b/jdk/src/share/native/com/sun/java/util/jar/pack/bands.cpp	Tue Oct 16 12:35:22 2012 -0700
@@ -187,6 +187,10 @@
 
 entry* band::getRefCommon(cpindex* ix_, bool nullOKwithCaller) {
   CHECK_0;
+  if (ix_ == NULL) {
+      abort("no index");
+      return NULL;
+  }
   assert(ix_->ixTag == ixTag
          || ((ixTag == CONSTANT_All ||
               ixTag == CONSTANT_LoadableValue ||

--- a/jdk/src/share/native/com/sun/java/util/jar/pack/bands.h	Tue Oct 16 12:29:10 2012 -0700
+++ b/jdk/src/share/native/com/sun/java/util/jar/pack/bands.h	Tue Oct 16 12:35:22 2012 -0700
@@ -99,8 +99,8 @@
 
   int    getByte()  { assert(ix == null); return vs[0].getByte(); }
   int    getInt()   { assert(ix == null); return vs[0].getInt(); }
-  entry* getRefN()  { assert(ix != null); return getRefCommon(ix, true); }
-  entry* getRef()   { assert(ix != null); return getRefCommon(ix, false); }
+  entry* getRefN()  { return getRefCommon(ix, true); }
+  entry* getRef()   { return getRefCommon(ix, false); }
   entry* getRefUsing(cpindex* ix2)
                     { assert(ix == null); return getRefCommon(ix2, true); }
   entry* getRefCommon(cpindex* ix, bool nullOK);

--- a/jdk/src/share/native/com/sun/java/util/jar/pack/unpack.cpp	Tue Oct 16 12:29:10 2012 -0700
+++ b/jdk/src/share/native/com/sun/java/util/jar/pack/unpack.cpp	Tue Oct 16 12:35:22 2012 -0700
@@ -281,11 +281,13 @@
 }
 
 inline cpindex* cpool::getFieldIndex(entry* classRef) {
+  if (classRef == NULL) { abort("missing class reference"); return NULL; }
   assert(classRef->tagMatches(CONSTANT_Class));
   assert((uint)classRef->inord < (uint)tag_count[CONSTANT_Class]);
   return &member_indexes[classRef->inord*2+0];
 }
 inline cpindex* cpool::getMethodIndex(entry* classRef) {
+  if (classRef == NULL) { abort("missing class reference"); return NULL; }
   assert(classRef->tagMatches(CONSTANT_Class));
   assert((uint)classRef->inord < (uint)tag_count[CONSTANT_Class]);
   return &member_indexes[classRef->inord*2+1];
@@ -1289,6 +1291,7 @@
     entry& e = cpMap[i];
     e.refs = U_NEW(entry*, e.nrefs = 2);
     e.refs[0] = cp_band1.getRef();
+    CHECK;
     e.refs[1] = cp_band2.getRef();
     CHECK;
   }
@@ -1369,6 +1372,7 @@
       entry& e = cpMap[i];
       e.refs = U_NEW(entry*, e.nrefs = 1);
       e.refs[0] = cp_MethodType.getRef();
+      CHECK;
   }
 }
 
@@ -2104,6 +2108,7 @@
     int    attrc   = ADH_BYTE_CONTEXT(header);
     int    idx     = ADH_BYTE_INDEX(header);
     entry* name    = attr_definition_name.getRef();
+    CHECK;
     entry* layout  = attr_definition_layout.getRef();
     CHECK;
     attr_defs[attrc].defineLayout(idx, name, layout->value.b.strval());
@@ -2208,7 +2213,9 @@
     if (ics[i].name == NO_ENTRY_YET) {
       // Long form.
       ics[i].outer = ic_outer_class.getRefN();
+      CHECK;
       ics[i].name  = ic_name.getRefN();
+      CHECK;
     } else {
       // Fill in outer and name based on inner.
       bytes& n = ics[i].inner->value.b;
@@ -2724,6 +2731,7 @@
           e = b.getRefUsing(cp.getKQIndex());
         else
           e = b.getRefN();
+        CHECK;
         switch (b.le_len) {
         case 0: break;
         case 1: putu1ref(e); break;
@@ -4006,6 +4014,7 @@
     NOT_PRODUCT(bc_superfield.setIndex(null));
     NOT_PRODUCT(bc_supermethod.setIndex(null));
   }
+  CHECK;
 
   for (int curIP = 0; ; curIP++) {
     int curPC = (int)(wpoffset() - codeBase);
@@ -4119,7 +4128,8 @@
         int coding = bc_initref.getInt();
         // Find the nth overloading of <init> in classRef.
         entry*   ref = null;
-        cpindex* ix = (classRef == null)? null: cp.getMethodIndex(classRef);
+        cpindex* ix = cp.getMethodIndex(classRef);
+        CHECK;
         for (int j = 0, which_init = 0; ; j++) {
           ref = (ix == null)? null: ix->get(j);
           if (ref == null)  break;  // oops, bad input
@@ -4396,6 +4406,7 @@
       case ADH_BYTE(ATTR_CONTEXT_CLASS, CLASS_ATTR_EnclosingMethod):
         aname = cp.sym[cpool::s_EnclosingMethod];
         putref(class_EnclosingMethod_RC.getRefN());
+        CHECK_0;
         putref(class_EnclosingMethod_RDN.getRefN());
         break;
 
@@ -4414,6 +4425,7 @@
         putu2(count = method_Exceptions_N.getInt());
         for (j = 0; j < count; j++) {
           putref(method_Exceptions_RC.getRefN());
+          CHECK_0;
         }
         break;
 
@@ -4437,16 +4449,18 @@
             // (253)     [(1)(2)(2)]
             // (254)     [(1)(2)(2)(2)]
             putu2(code_StackMapTable_offset.getInt());
+            CHECK_0;
             for (int k = (tag - 251); k > 0; k--) {
               put_stackmap_type();
+              CHECK_0;
             }
           } else {
             // (255)     [(1)NH[(2)]NH[(2)]]
             putu2(code_StackMapTable_offset.getInt());
             putu2(j2 = code_StackMapTable_local_N.getInt());
-            while (j2-- > 0)  put_stackmap_type();
+            while (j2-- > 0) {put_stackmap_type(); CHECK_0;}
             putu2(j2 = code_StackMapTable_stack_N.getInt());
-            while (j2-- > 0)  put_stackmap_type();
+            while (j2-- > 0)  {put_stackmap_type(); CHECK_0;}
           }
         }
         break;
@@ -4470,7 +4484,9 @@
           bii    += code_LocalVariableTable_span_O.getInt();
           putu2(to_bci(bii) - bci);
           putref(code_LocalVariableTable_name_RU.getRefN());
+          CHECK_0;
           putref(code_LocalVariableTable_type_RS.getRefN());
+          CHECK_0;
           putu2(code_LocalVariableTable_slot.getInt());
         }
         break;
@@ -4485,7 +4501,9 @@
           bii    += code_LocalVariableTypeTable_span_O.getInt();
           putu2(to_bci(bii) - bci);
           putref(code_LocalVariableTypeTable_name_RU.getRefN());
+          CHECK_0;
           putref(code_LocalVariableTypeTable_type_RS.getRefN());
+          CHECK_0;
           putu2(code_LocalVariableTypeTable_slot.getInt());
         }
         break;
@@ -4513,7 +4531,7 @@
         break;
       }
     }
-
+    CHECK_0;
     if (aname == null) {
       // Unparse a compressor-defined attribute.
       layout_definition* lo = ad.getLayout(idx);
@@ -4669,7 +4687,9 @@
       flags &= ~ACC_IC_LONG_FORM;  // clear high bit if set to get clean zero
       extra_ic.flags = flags;
       extra_ic.outer = class_InnerClasses_outer_RCN.getRefN();
+      CHECK_0;
       extra_ic.name  = class_InnerClasses_name_RUN.getRefN();
+      CHECK_0;
       // Detect if this is an exact copy of the global tuple.
       if (global_ic != null) {
         if (global_ic->flags != extra_ic.flags ||
@@ -4778,6 +4798,7 @@
   julong indexMask = ad.flagIndexMask();
 
   cur_class = class_this.getRef();
+  CHECK;
   cur_super = class_super.getRef();
   CHECK;
 
@@ -4791,6 +4812,7 @@
   putu2(num = class_interface_count.getInt());
   for (i = 0; i < num; i++) {
     putref(class_interface.getRef());
+    CHECK;
   }
 
   write_members(class_field_count.getInt(),  ATTR_CONTEXT_FIELD);