Running with -XX:+VerifyAliases immediately hits assert:

#  Internal Error (open/src/hotspot/share/opto/memnode.cpp:4736), pid=19888, tid=19901
#  assert(alias_idx >= Compile::AliasIdxRaw) failed: must not disturb base_memory or sentinel

V  [libjvm.so+0x113bf94]  verify_memory_slice(MergeMemNode const*, int, Node*) [clone .part.199]+0xf4
V  [libjvm.so+0x1142e20]  MergeMemNode::set_memory_at(unsigned int, Node*)+0xd0
V  [libjvm.so+0xb4a2a6]  GraphKit::store_to_memory(Node*, Node*, Node*, BasicType, int, MemNode::MemOrd, bool, bool, bool, bool)+0x1c6
V  [libjvm.so+0xb3bf76]  GraphKit::gen_stub(unsigned char*, char const*, int, bool, bool)+0x966
V  [libjvm.so+0x871d8f]  Compile::Compile(ciEnv*, TypeFunc const* (*)(), unsigned char*, char const*, int, bool, bool, bool, DirectiveSet*)+0x8cf
V  [libjvm.so+0x1396b17]  OptoRuntime::generate_stub(ciEnv*, TypeFunc const* (*)(), unsigned char*, char const*, int, bool, bool, bool)+0x147
V  [libjvm.so+0x1396fdb]  OptoRuntime::generate(ciEnv*)+0x3b
V  [libjvm.so+0x6e3c2f]  C2Compiler::init_c2_runtime()+0x11f
V  [libjvm.so+0x6e3d25]  C2Compiler::initialize()+0x25

Reproduces with: java -XX:+VerifyAliases