Initialize finalizer_list_marked

[yuyichao]

Noticed this when I was checking #11814.

This doesn't cause a crash because arraylist_grow thinks the items == NULL != &_space[0] is a malloc'd array and called realloc on it (which is allowed).

The implementation seems to be robust against this but this IMHO should be fixed.

Note that this does not fix #11814

[carnaval]

oh wow. that's bad. CI then merge. Thanks :-)

[ScottPJones]

This is one of the things I was trying to get fixed in #11751...

[carnaval]

Well we definitely could add some checks for this, I don't think anyone would disagree, it's a bit less of a pervasive (and apparently controversial) change than the whole diff of your PR.

[yuyichao]

Apparently not ScottPJones@88b6135#diff-31b93f4272eaeede3738531e90317e0cL2549

[ScottPJones]

@yuyichao I hadn't yet pushed all the changes I had made, after I was told #11751 should be in separate, small commits, or PRs. I was busy working, enjoying Father's Day, and fixing """.

[StefanKarpinski]

@ScottPJones, if you had identified this issue and submitted this PR – or even just an issue clearly identifying this problem – it would have been merged (or fixed) right away.

[ScottPJones]

I was still trying to get it all to work, fixing the other initialization problem, which I did bring up in my WIP issue, but I can't do everything at once, and also keep up with my job with the Belgians.

[ScottPJones]

Anyway, this is a very good catch, hopefully it will be merged right away.