Changelog for Groovy 5.1.1

Bug

• [GROOVY-12142] - Metaspace memory leak with parallel deployments on Tomcat
• [GROOVY-12166] - STC: `return field instanceof Subtype` narrows the field's type class-wide, causing `ClassCastException` -- Groovy 5 regression
• [GROOVY-12257] - Groovy 4 @Immutable bytecode fails on Groovy 5 because ObjectUtil was removed

Dependency upgrade

• [GROOVY-12286] - Bump jackson to 2.22.2

Improvement

• [GROOVY-12268] - resolveClass initializes classes named in the stream