Memory leak with dynamic array

[Joseph Wakeling]

Joseph Wakeling wrote:
> On the other hand, if the assumeSafeAppend takes place outside the loops
> entirely, blow-up occurs -- because the command is not issued after the
> array resize to zero?  I've attached examples.

If I include a line

     x.reserve(5_000_000);

before the assumeSafeAppend, the memory does not explode indefinitely --
but it uses about 3x as much memory as the 'NoLeak' code even when the
latter lacks advance reservation of memory.