[rurban]

Not because the surface area is smaller in perl6, only because with GC those use-after-free bugs do not happen. Only with refcounted VM's, where it's easy to access a value with refcount 0. With a GC other memory bugs are common: Forgetting write-barriers, forgetting roots, external data.

And since most of the old dynamic languages (and also the new conservatives ones) are refcounted, the most common error is use-after-free, and then buffer overflows (heap or stack).

off-by-one is common to all systems.

Since I know perl5 and perl6 internals inside out I wouldn't bet that perl6 is more secure than perl5 at all. The perl5 is more hairy and eroded over time, but the perl6 vm is not really battle-proof and way too slow to be serious.