--- old/src/hotspot/share/gc/g1/g1BlockOffsetTable.inline.hpp	2019-11-21 11:57:06.410917000 +0100
+++ new/src/hotspot/share/gc/g1/g1BlockOffsetTable.inline.hpp	2019-11-21 11:57:05.978909702 +0100
@@ -55,7 +55,7 @@
 }
 
 void G1BlockOffsetTable::set_offset_array_raw(size_t index, u_char offset) {
-  Atomic::store(offset, &_offset_array[index]);
+  Atomic::store(&_offset_array[index], offset);
 }
 
 void G1BlockOffsetTable::set_offset_array(size_t index, u_char offset) {