Description
*Note that we tested 2.12.9 via https://github.com/apache/spark/pull/25404 and found that 2.12.9 has a serious bug, https://github.com/scala/bug/issues/11665 *
We will skip 2.12.9 and try to upgrade 2.12.10 directly in this PR.
Highlights (2.12.9)
- Faster compiler: 5–10% faster since 2.12.8, thanks to many optimizations (mostly by Jason Zaugg and Diego E. Alonso-Blas: kudos!)
- Improved compatibility with JDK 11, 12, and 13
- Experimental support for build pipelining and outline type checking