A code in `AddRareFeature` function is unclear for me

[Sehoon Kim]

https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/fuzzer/FuzzerCorpus.h#L374

It seems like `MostAbundantRareFeatureIndices` is supposed to have the most, and the second most abundant features. This would work if the loop meets the second most one first and then meets the most one. But if the loop meets the most abundant feature first, the second most feature wouldn’t  be updated correctly. It would be great if you let me know what I’m missing here as it’s my first time to look into LibFuzzer source. Thanks in advance!