--- old/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp	2019-05-08 16:25:27.815831006 +0200
+++ new/src/hotspot/share/gc/shenandoah/shenandoahAsserts.cpp	2019-05-08 16:25:27.607834031 +0200
@@ -250,7 +250,7 @@
                   file, line);
   }
 
-  size_t alloc_size = obj->size() + ShenandoahForwarding::word_size();
+  size_t alloc_size = obj->size();
   if (alloc_size > ShenandoahHeapRegion::humongous_threshold_words()) {
     size_t idx = r->region_number();
     size_t num_regions = ShenandoahHeapRegion::required_regions(alloc_size * HeapWordSize);