--- old/src/hotspot/share/compiler/oopMap.cpp	2018-04-20 00:46:52.000000000 +0100
+++ new/src/hotspot/share/compiler/oopMap.cpp	2018-04-20 00:46:52.000000000 +0100
@@ -389,6 +389,9 @@
           tty->print_cr("register r");
           omv.reg()->print();
           tty->print_cr("loc = %p *loc = %p\n", loc, (address)*loc);
+          os::print_location(tty, (intptr_t)*loc);
+          tty->print("pc: "); os::print_location(tty, (intptr_t)fr->pc());
+          fr->print_value_on(tty, NULL);
           // do the real assert.
           assert(Universe::heap()->is_in_or_null(*loc), "found non oop pointer");
         }