jhorstmann opened a new pull request #1421:
URL: https://github.com/apache/arrow-rs/pull/1421


   # Which issue does this PR close?
   
   <!---
   We generally require a GitHub issue to be filed for all bug fixes and 
enhancements and this helps us generate change logs for our releases. You can 
link an issue to this PR using the GitHub syntax. For example `Closes #123` 
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   Closes #1410.
   
   # Rationale for this change
   
   Changes the `push`, `push_unchecked` and `extend_from_iter` functions so 
that data is transfered using `copy_nonoverlapping` which works for unaligned 
destinations. LLVM will most likely transform this again into a single 
unaligned write. This also makes these methods actually use the `ToByteSlice` 
trait. In `extend_from_slice`, which this PR did not change, the trait is more 
used like a marker trait because the whole slice is copied without going 
through the trait methods. This is probably fine since it's supposed to be an 
internal trait that is only implemented for `ArrowNativeType`.
   
   All newly added tests were previously failing when running under miri.
    
   


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