lordsunland

There is https://issues.apache.org/jira/browse/ARROW-6717 tracking moving to stable Rust, and https://issues.apache.org/jira/browse/ARROW-4678 is also relevant. Feel free to create a sub-task under the former to remove specialization :)

The main blocker is specialization as it's being used in several places including parquet and arrow crate. As this feature is unlikely to be stabilized, we'll need to replace it with something else but so far it is challenging.