[Bug 210169] lib/libc/string/memcpy_test:memcpy_basic fails on recent CURRENT; random numbers have changed

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210169

            Bug ID: 210169
           Summary: lib/libc/string/memcpy_test:memcpy_basic fails on
                    recent CURRENT; random numbers have changed
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: ngie at FreeBSD.org

Something has changed in the last few weeks to random(3), or the random
producers where it's no longer producing the same random numbers, thus
resulting in kyua failures. Example:

$ kyua debug -k /usr/tests/lib/libc/string/Kyuafile memcpy_test:memcpy_basic
memcpy_test:memcpy_basic  ->  failed:
/usr/src/contrib/netbsd-tests/lib/libc/string/t_memcpy.c:115: strcmp(result,
goodResult) != 0: 5ab4443f0e3e058d94087d9f2a11ef5e !=
217b4fbe456916bf62a2f85df752e4ab

Procedure:

- Build/install ^/head (with pending commit to get needed debug output from
memcpy_test when it fails).
- kyua debug -k /usr/tests/lib/libc/string/Kyuafile memcpy_test:memcpy_basic

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