Quite a number of test failures show crashing deoptimization:

E.g. compiler/valhalla/inlinetypes/TestCastMismatch.java

#11 <signal handler called>
#12 ObjectValue::maybe_null (this=0x7fffa8733ad0) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/code/debugInfo.hpp:173
#13 0x00007ffff668a367 in StackValue::create_stack_value<RegisterMap> (fr=0x7fffa8732748, reg_map=0x7fffa8732788, sv=0x7fffa8733ad0) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/stackValue.cpp:251
#14 0x00007ffff683e89f in compiledVFrame::create_stack_value (this=0x7fffa8732740, sv=0x7fffa8733ad0) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/vframe_hp.cpp:230
#15 0x00007ffff683db8f in compiledVFrame::locals (this=0x7fffa8732740) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/vframe_hp.cpp:66
#16 0x00007ffff683ad99 in vframeArrayElement::fill_in (this=0x7fff6801df60, vf=0x7fffa8732740, realloc_failures=false) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/vframeArray.cpp:121
#17 0x00007ffff683ca13 in vframeArray::fill_in (this=0x7fff6801cc80, thread=0x7ffff0569d70, frame_size=10, chunk=0x7fffa802e400, reg_map=0x7fffc681e6c0, realloc_failures=false) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/vframeArray.cpp:523
#18 0x00007ffff683c995 in vframeArray::allocate (thread=0x7ffff0569d70, frame_size=10, chunk=0x7fffa802e400, reg_map=0x7fffc681e6c0, sender=..., caller=..., self=..., realloc_failures=false) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/vframeArray.cpp:510
#19 0x00007ffff5c30b03 in Deoptimization::create_vframeArray (thread=0x7ffff0569d70, fr=..., reg_map=0x7fffc681e6c0, chunk=0x7fffa802e400, realloc_failures=false) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/deoptimization.cpp:1775
#20 0x00007ffff5c2c28d in Deoptimization::fetch_unroll_info_helper (current=0x7ffff0569d70, exec_mode=2) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/deoptimization.cpp:588
#21 0x00007ffff5c33cd4 in Deoptimization::uncommon_trap (current=0x7ffff0569d70, trap_request=172, exec_mode=2) at /scratch/dsimms/hotspot/git/valhalla/open/src/hotspot/share/runtime/deoptimization.cpp:2669

The ObjectValue "_is_init" field, specific to Valhalla is null

The merge is not yet in project, but here:

https://github.com/MrSimms/valhalla/tree/lworld_merge_jdk_22_7