mhseiden opened a new issue #593:
URL: https://github.com/apache/arrow-rs/issues/593


   **Describe the bug**
   From my testing, it appears that functions in `temporal_conversions` do not 
handle negative integers correctly. The cast of a negative number to a `u32` 
results in a junk value that causes `chrono` to panic.
   
   **To Reproduce**
   The following playground snippet reproduces the issue, using the code in 
`5.0.0`. 
https://docs.rs/arrow/5.0.0/src/arrow/temporal_conversions.rs.html#98-105
   
   
https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=d0a2b89c4fdb666b55627d4a371f8ec8
   
   **Expected behavior**
   The conversion functions should handle timestamps before the epoch correctly.
   
   **Additional context**
   I discovered this via the `Debug` impl for a Timestamp column type. Other 
basic operations on the column w/ negative timestamps seem to work without a 
problem, but I haven't tested thoroughly.  
   


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