/usr/share/doc/libaunit-doc/examples/failures/ is in libaunit-doc 3.7.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libaunit-doc/examples/failures/Makefile
/usr/share/doc/libaunit-doc/examples/failures/harness.gpr
/usr/share/doc/libaunit-doc/examples/failures/tested_lib/
/usr/share/doc/libaunit-doc/examples/failures/tested_lib/src/
/usr/share/doc/libaunit-doc/examples/failures/tested_lib/src/math.adb
/usr/share/doc/libaunit-doc/examples/failures/tested_lib/src/math.ads
/usr/share/doc/libaunit-doc/examples/failures/tested_lib/testlib.gpr
/usr/share/doc/libaunit-doc/examples/failures/tests/
/usr/share/doc/libaunit-doc/examples/failures/tests/math-test.adb
/usr/share/doc/libaunit-doc/examples/failures/tests/math-test.ads
/usr/share/doc/libaunit-doc/examples/failures/tests/math_suite.adb
/usr/share/doc/libaunit-doc/examples/failures/tests/math_suite.ads
/usr/share/doc/libaunit-doc/examples/failures/tests/test_math.adb