--- a/src/hotspot/share/gc/parallel/psParallelCompact.cpp	Mon Mar 25 15:37:06 2019 +0100
+++ b/src/hotspot/share/gc/parallel/psParallelCompact.cpp	Mon Mar 25 14:46:55 2019 +0100
@@ -406,19 +406,16 @@
 size_t mark_bitmap_size;
 #endif  // #ifdef ASSERT
 
-ParallelCompactData::ParallelCompactData()
-{
-  _region_start = 0;
-
-  _region_vspace = 0;
-  _reserved_byte_size = 0;
-  _region_data = 0;
-  _region_count = 0;
-
-  _block_vspace = 0;
-  _block_data = 0;
-  _block_count = 0;
-}
+ParallelCompactData::ParallelCompactData() :
+  _region_start(NULL),
+  DEBUG_ONLY(_region_end(NULL) COMMA)
+  _region_vspace(NULL),
+  _reserved_byte_size(0),
+  _region_data(NULL),
+  _region_count(0),
+  _block_vspace(NULL),
+  _block_data(NULL),
+  _block_count(0) {}
 
 bool ParallelCompactData::initialize(MemRegion covered_region)
 {