[Bug c++/63489] stack allocated array pointer corrupted

[jonathan.hogg at stfc dot ac.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63489

--- Comment #3 from Jonathan Hogg <jonathan.hogg at stfc dot ac.uk> ---
Confirmed, this is the cause is the larger example as well. I had missed the
introduction of -fsanitize=address, useful feature. I'd assumed something like
that valgrind would have picked up for me however!