diff -r b606aa2b32d1 -r 489f8e536bc0 jdk/src/java.base/share/classes/java/lang/invoke/BoundMethodHandle.java
--- a/jdk/src/java.base/share/classes/java/lang/invoke/BoundMethodHandle.java	Wed Oct 07 15:29:55 2015 +0200
+++ b/jdk/src/java.base/share/classes/java/lang/invoke/BoundMethodHandle.java	Tue Oct 27 09:09:37 2015 +0100
@@ -404,14 +404,6 @@
             d = lookupCache(types);
             // Class loading must have upgraded the cache.
             assert(d != null && !d.isPlaceholder());
-            if (OBSERVE_BMH_SPECIES_CREATION) {
-                if (d == null) {
-                    throw new IllegalStateException("d == null");
-                }
-                if (d.isPlaceholder()) {
-                    throw new IllegalStateException("d is place holder");
-                }
-            }
             return d;
         }
         static SpeciesData getForClass(String types, Class<? extends BoundMethodHandle> clazz) {
@@ -423,9 +415,6 @@
             if (d != null)  return d;
             d = new SpeciesData(types);
             assert(d.isPlaceholder());
-            if (OBSERVE_BMH_SPECIES_CREATION && !d.isPlaceholder()) {
-                throw new IllegalStateException("d is not place holder");
-            }
             CACHE.put(types, d);
             return d;
         }
@@ -433,15 +422,6 @@
             SpeciesData d2;
             assert((d2 = CACHE.get(types)) == null || d2.isPlaceholder());
             assert(!d.isPlaceholder());
-            if (OBSERVE_BMH_SPECIES_CREATION) {
-                d2 = CACHE.get(types);
-                if (d2 != null && !d2.isPlaceholder()) {
-                    throw new IllegalStateException("non-null d2 is not place holder");
-                }
-                if (d.isPlaceholder()) {
-                    throw new IllegalStateException("d is place holder");
-                }
-            }
             CACHE.put(types, d);
             return d;
         }