alamb commented on pull request #822:
URL: https://github.com/apache/arrow-rs/pull/822#issuecomment-939370985


   > I think we should have some notes around the usages of unsafe: why is it 
sound in this place?
   
   It is a good idea @Dandandan  -- I will attempt to do so. To be honest I am 
not sure why all the references are legitimate uses of `unsafe`.
   
   I don't think this PR has made the code any more or less safe / unsafe than 
it was before. However, it is now clearer where assumptions are made (they are 
all annotated with `unsafe`). I sort of imagine over time people can chip away 
at removing the `unsafe` possible


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