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<areece> I've asked a couple of times but wanted to ask a different group: does rust use a custom llvm or can it be linked against the latest llvm release?
<pcwalton> areece: it's custom
<areece> (alternatively, how do I ask the mailing list)
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<pcwalton> depends on some GC changes that we haven't upstreamed
<areece> pcwalton: so how will it fail if I don't use the custom llvm?
<areece> will it just subtly fail eventually?
<areece> because it builds successfully
<bstrie> it might not fail at all if gc isn't enabled
<pcwalton> if you don't use the GC I think it might well work
<pcwalton> the normal behavior is not to use the GC
<pcwalton> it's experimental and doesn't pass all tests yet
<pcwalton> the precise GC, that is
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<bstrie> areece: currently heap-allocated types use ref counting rather than gc
<bstrie> so you can still heap-allocate
<bstrie> but I don't think there's a cycle collector
<areece> hrm
<bstrie> at least not since yesterday :)
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<areece> so moral of the story is it will fail if I do something interesting in some cases?
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<areece> and by fail, it just won't gc
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<bstrie> areece: if you avoid compiling anything with the experimental gc flag, I think you should be okay