JTReg jdk tests java/util/NavigableMap/LockStep.java and java/util/Map/Collisions.java fail with the above assertion when run with -XX:+EnableValhalla.

Stack: [0x00007f5ba6301000,0x00007f5ba6402000], sp=0x00007f5ba63fc290, free space=1004k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x1896c27] VMError::report_and_die(int, char const*, char const*, __va_list_tag*, Thread*, unsigned char*, void*, void*, char const*, int, unsigned long)+0x257
V [libjvm.so+0x1897a2f] VMError::report_and_die(Thread*, void*, char const*, int, char const*, char const*, __va_list_tag*)+0x2f
V [libjvm.so+0xae1200] report_vm_error(char const*, int, char const*, char const*, ...)+0x100
V [libjvm.so+0x124970b] IdealLoopTree::compute_trip_count(PhaseIdealLoop*)+0xeb
V [libjvm.so+0x1254e2f] IdealLoopTree::iteration_split_impl(PhaseIdealLoop*, Node_List&)+0x1f
V [libjvm.so+0x125564a] IdealLoopTree::iteration_split(PhaseIdealLoop*, Node_List&)+0x24a
V [libjvm.so+0x127bb7a] PhaseIdealLoop::build_and_optimize(bool, bool)+0xe4a
V [libjvm.so+0xa3def3] Compile::Optimize()+0x393
V [libjvm.so+0xa3f8d1] Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool, bool, DirectiveSet*)+0xd81
V [libjvm.so+0x814f51] C2Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0xd1
V [libjvm.so+0xa4cfc3] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x403
V [libjvm.so+0xa4df87] CompileBroker::compiler_thread_loop()+0x317
V [libjvm.so+0x17b81c7] JavaThread::thread_main_inner()+0x2c7
V [libjvm.so+0x17b8548] JavaThread::run()+0x278
V [libjvm.so+0x14b8430] thread_native_entry(Thread*)+0x100