--- old/src/share/vm/oops/typeArrayOop.hpp	2015-10-30 19:14:52.048475658 +0100
+++ new/src/share/vm/oops/typeArrayOop.hpp	2015-10-30 19:14:51.980475655 +0100
@@ -48,47 +48,47 @@
 
  public:
   jbyte* byte_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &byte_base()[which];
   }
 
   jboolean* bool_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &bool_base()[which];
   }
 
   jchar* char_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &char_base()[which];
   }
 
   jint* int_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &int_base()[which];
   }
 
   jshort* short_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &short_base()[which];
   }
 
   jushort* ushort_at_addr(int which) const {  // for field descriptor arrays
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return (jushort*) &short_base()[which];
   }
 
   jlong* long_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &long_base()[which];
   }
 
   jfloat* float_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &float_base()[which];
   }
 
   jdouble* double_at_addr(int which) const {
-    assert(is_within_bounds(which), "index out of bounds");
+    assert(is_within_bounds(which), "index %d out of bounds %d", which, length());
     return &double_base()[which];
   }