[PATCH 1/3] TODO tests for base64 decoding failures When the input is a suitably long string (24 to 26 characters), sv_to_uuid() decodes it as base64 but doesn't check if the result makes sense. The decoding process silently ignores illegal base64 characters and padding after '='.
This can break test 28 when Perl pointers stringify to a suitably long string, such as "Blah=HASH(0x555555f30d18)".
Add TODO tests showing the behaviour on all platforms.
[PATCH 2/3] Check that a base64 decoded string is long enough to be a UUID
This fixes test failures on platforms where Perl pointers stringify to a suitably long string, making "Blah=HASH(0x555555f30d18)" a candidate for base64 decoding.
