Github user paulk-asert commented on a diff in the pull request:
https://github.com/apache/groovy/pull/797#discussion_r217899707
--- Diff: build.gradle ---
@@ -160,6 +160,8 @@ ext {
spockVersion = '1.2-groovy-2.4-SNAPSHOT' // supports 3.0
antlr4Version = '4.7.1'
jsr305Version = '3.0.2'
+ jacksondataformatyamlVersion = '2.9.6'
+ jacksondatabindVersion = '2.9.6'
--- End diff --
I'd move these into the subproject too---
