--- old/src/hotspot/share/gc/g1/g1StringDedup.cpp	2017-10-13 11:45:28.913263833 -0400
+++ new/src/hotspot/share/gc/g1/g1StringDedup.cpp	2017-10-13 11:45:28.353668203 -0400
@@ -210,5 +210,5 @@
 // access by the current thread. Returns the table bucket number where
 // the claimed partition starts.
 size_t G1StringDedupUnlinkOrOopsDoClosure::claim_table_partition(size_t partition_size) {
-  return (size_t)Atomic::add(partition_size, &_next_bucket) - partition_size;
+  return Atomic::add(partition_size, &_next_bucket) - partition_size;
 }