Shadow Version

5.0.0 (currently latest)

Gradle Version

5.1.1

Groovy version

2.5.7 (same issue with 3.0.0-beta-1) (currently latest)

Expected Behavior

While using Date.parse(String, String) or LocalDateTime(String, String) which are defined in extension classes, the shadow jar should be able to get the extension function.

Actual Behavior

When running without shadow, no problem.
With runShadow :
groovy.lang.MissingMethodException: No signature of method: static java.time.LocalDateTime.parse()
or
groovy.lang.MissingMethodException: No signature of method: static java.util.Date.parse()

Gradle Build Script(s)

dependencies {
implementation 'org.codehaus.groovy:groovy:2.5.7'
implementation 'org.codehaus.groovy:groovy-dateutil:2.5.7'
implementation 'org.codehaus.groovy:groovy-datetime:2.5.7'
}
[...]
shadowJar {
mergeGroovyExtensionModules()
}

Content of Shadow JAR (jar tf <jar file> - post link to GIST if too long)

The META-INF/groovy/org.codehaus.groovy.runtime.ExtensionModule file only contains one extension module reference :

moduleName=groovy-dateutil
moduleVersion=2.5.7
extensionClasses=org.apache.groovy.dateutil.extensions.DateUtilExtensions
staticExtensionClasses=org.apache.groovy.dateutil.extensions.DateUtilStaticExtensions

The file should contain all merged extensions classes (comma separated) : http://docs.groovy-lang.org/latest/html/documentation/#module-descriptor