Have I written a silly program or is there a "controlled" memory leak?

[giaco]

also compiler instrumentation is your friend

<https://lemire.me/blog/2016/04/20/no-more-leaks-with-sanitize-flags-in-gcc-and-clang/>

<https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html>

use it with --debugger:native