/usr/lib/ is in libc++abi-test 3.5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libcxxabi/
/usr/lib/libcxxabi/test/
/usr/lib/libcxxabi/test/catch_in_noexcept.cpp
/usr/lib/libcxxabi/test/test_vector3.cpp
/usr/lib/libcxxabi/test/catch_array_01.cpp
/usr/lib/libcxxabi/test/test_aux_runtime.cpp
/usr/lib/libcxxabi/test/test_vector2.cpp
/usr/lib/libcxxabi/test/catch_function_01.cpp
/usr/lib/libcxxabi/test/CMakeLists.txt
/usr/lib/libcxxabi/test/catch_class_02.cpp
/usr/lib/libcxxabi/test/lit.cfg
/usr/lib/libcxxabi/test/catch_function_02.cpp
/usr/lib/libcxxabi/test/testit
/usr/lib/libcxxabi/test/unwind_03.cpp
/usr/lib/libcxxabi/test/lit.site.cfg.in
/usr/lib/libcxxabi/test/catch_member_function_pointer_01.cpp
/usr/lib/libcxxabi/test/dynamic_cast14.cpp
/usr/lib/libcxxabi/test/test_demangle.cpp
/usr/lib/libcxxabi/test/catch_member_pointer_nullptr.cpp
/usr/lib/libcxxabi/test/dynamic_cast_stress.cpp
/usr/lib/libcxxabi/test/unwind_02.cpp
/usr/lib/libcxxabi/test/catch_pointer_reference.cpp
/usr/lib/libcxxabi/test/catch_ptr_02.cpp
/usr/lib/libcxxabi/test/test_vector1.cpp
/usr/lib/libcxxabi/test/test_fallback_malloc.cpp
/usr/lib/libcxxabi/test/catch_class_03.cpp
/usr/lib/libcxxabi/test/unwind_04.cpp
/usr/lib/libcxxabi/test/unwind_05.cpp
/usr/lib/libcxxabi/test/catch_ptr.cpp
/usr/lib/libcxxabi/test/catch_pointer_nullptr.cpp
/usr/lib/libcxxabi/test/catch_class_01.cpp
/usr/lib/libcxxabi/test/inherited_exception.cpp
/usr/lib/libcxxabi/test/catch_member_data_pointer_01.cpp
/usr/lib/libcxxabi/test/catch_const_pointer_nullptr.cpp
/usr/lib/libcxxabi/test/catch_array_02.cpp
/usr/lib/libcxxabi/test/unwind_06.cpp
/usr/lib/libcxxabi/test/dynamic_cast3.cpp
/usr/lib/libcxxabi/test/catch_class_04.cpp
/usr/lib/libcxxabi/test/test_exception_storage.cpp
/usr/lib/libcxxabi/test/dynamic_cast5.cpp
/usr/lib/libcxxabi/test/unwind_01.cpp
/usr/lib/libcxxabi/test/test_guard.cpp