This is xnu-8019. See this file in:
Directory listing for xnu-8019//tests/bounded_array_ref_src
begin_end.cpp
compare.equal.nullptr.cpp
ctor.C_array.cpp
ctor.begin_end.cpp
ctor.bounded_array.cpp
ctor.bounded_ptr.cpp
ctor.default.cpp
ctor.raw_ptr.cpp
data.cpp
for_loop.cpp
operator.bool.cpp
operator.subscript.cpp
size.cpp
slice.cpp
test_policy.h