Imported GNU Classpath 0.19 + gcj-import-20051115.

* sources.am: Regenerated.
       * Makefile.in: Likewise.
       * scripts/makemake.tcl: Use glob -nocomplain.

From-SVN: r107049

libjava/classpath/java/util/WeakHashMap.java

@@ -241,7 +241,8 @@ public class WeakHashMap extends AbstractMap implements Map
           // This method will get inlined.
           cleanQueue();
           if (knownMod != modCount)
-            throw new ConcurrentModificationException();
+            throw new ConcurrentModificationException(knownMod + " != "
+                                                      + modCount);
         }
 
         /**
@@ -698,21 +699,20 @@ public class WeakHashMap extends AbstractMap implements Map
     // bucket may be enqueued later by the garbage collection, and
     // internalRemove will be called a second time.
     bucket.slot = -1;
-    if (buckets[slot] == bucket)
-      buckets[slot] = bucket.next;
-    else
+
+    WeakBucket prev = null;
+    WeakBucket next = buckets[slot];
+    while (next != bucket)
       {
-        WeakBucket prev = buckets[slot];
-        /* This may throw a NullPointerException.  It shouldn't but if
-         * a race condition occurred (two threads removing the same
-         * bucket at the same time) it may happen.  <br>
-         * But with race condition many much worse things may happen
-         * anyway.
-         */
-        while (prev.next != bucket)
-          prev = prev.next;
-        prev.next = bucket.next;
+         if (next == null) throw new InternalError("WeakHashMap in incosistent state");
+         prev = next; 
+         next = prev.next;
       }
+    if (prev == null)
+      buckets[slot] = bucket.next;
+    else 
+      prev.next = bucket.next;
+
     size--;
   }