Probable problem with ASAN

I stumbled upon this crate on r/rust. I haven't tried it because I'm currently not on a machine that supports ASAN (arm64), but quickly looking at the code, combined with my experience maintaining something similar in Firefox, this crate likely fails in bad ways when building with ASAN. What happens in that case is that each item actually ends up larger than their size, to allow ASAN to do its magic. Which means a) the list is actually larger (in bytes) than expected b) there's a bunch of 0 bytes in between items. In Firefox, what was being aggregated was pointers, so the nulls between items were the same size as the items themselves, but I wouldn't be surprised if the size of the nulls doesn't match with larger items.