Reducing the 'aaaa' string to: --mysqld=--aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa removes the Valgrind warning. Adding 10x 'a' and it happens again.
Reducing the 'aaaa' string to: --mysqld= --aaaaaaaaaaaaa aaaaaaaaaaaaaaa aa removes the Valgrind warning. Adding 10x 'a' and it happens again.