[lworld] C2 compilation fails with assert(!t->is_flat() && !t->is_not_flat()) failed: Should have been optimized out

# Internal Error (/oracle/valhalla/open/src/hotspot/share/opto/macro.cpp:2926), pid=586656, tid=586669
# assert(!t->is_flat() && !t->is_not_flat()) failed: Should have been optimized out

Current CompileTask:
C2: 665 32 b 4 java.util.concurrent.LinkedTransferQueue$LTQSpliterator::trySplit (153 bytes)

Stack: [0x00007f2114c35000,0x00007f2114d36000], sp=0x00007f2114d31470, free space=1009k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x13af7c3] PhaseMacroExpand::expand_flatarraycheck_node(FlatArrayCheckNode*)+0x103
V [libjvm.so+0x13b8034] PhaseMacroExpand::expand_macro_nodes()+0xd44
V [libjvm.so+0xa27150] Compile::Optimize()+0x1800
V [libjvm.so+0xa28ee8] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, DirectiveSet*)+0x1ab8
V [libjvm.so+0x8528fc] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x1dc
V [libjvm.so+0xa38d90] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xca0
V [libjvm.so+0xa39898] CompileBroker::compiler_thread_loop()+0x5a8
V [libjvm.so+0x191e2a6] JavaThread::thread_main_inner()+0x256
V [libjvm.so+0x1924f60] Thread::call_run()+0x100
V [libjvm.so+0x15efff6] thread_native_entry(Thread*)+0x116