[GROOVY-11107] EnumSet varargs constructor is not recognized (broken) in runtime

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.22, 3.0.17
• Fix Version/s: 3.0.18

Language

groovy

• Assignee: Eric Milles
• Reporter: Anton Panikov
• Created: 21/Jun/23 01:16
• Updated: 23/Aug/23 09:09
• Resolved: 21/Jun/23 15:54

Description

EnumSet.of() has 6 overloaded variants, the one with varargs is throwing GroovyRuntimeException, claiming it can not find a proper constructor. But it is working for jdk 8 with any Groovy version: 2.4, 2.5, 3.0 and 4.0, broken for jdk 11 and 17 with 2.5 and 3.0 and working fine for groovy 4.0 with any jdk.

It is a runtime exception and the code needs to access the field:

 

package test
enum Test1 {
    ONE,
    TWO,
    THREE,
    FOUR,
    FIVE,
    SIX
    
    public static EnumSet<Test1> test1 = EnumSet.of(ONE, TWO, THREE, FOUR, FIVE, SIX)
    //public static EnumSet<Test1> test2 = EnumSet.of(ONE, TWO, THREE, FOUR) + EnumSet.of(FIVE, SIX) // workaround to not use varargs, works for any combinations
}
class Application {
    static void main(String[] args) {
        Test1.test1
   }
}

It was working fine in groovy 2.4 and all groovy version using jdk 8. But in groovy 2.5 and 3.0, using JDK 11 and 17 it is throwing an exception:

Exception in thread "main" java.lang.ExceptionInInitializerError
    at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized0(Native Method)
    at java.base/jdk.internal.misc.Unsafe.ensureClassInitialized(Unsafe.java:1042)
    at java.base/jdk.internal.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:43)
    at java.base/jdk.internal.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:186)
    at java.base/java.lang.reflect.Field.acquireFieldAccessor(Field.java:1105)
    at java.base/java.lang.reflect.Field.getFieldAccessor(Field.java:1086)
    at java.base/java.lang.reflect.Field.get(Field.java:418)
    at org.codehaus.groovy.reflection.CachedField.getProperty(CachedField.java:70)
    at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:1890)
    at groovy.lang.MetaClassImpl.getProperty(MetaClassImpl.java:3827)
    at org.codehaus.groovy.runtime.callsite.ClassMetaClassGetPropertySite.getProperty(ClassMetaClassGetPropertySite.java:50)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:329)
    at test.Application.main(Application.groovy:20)
Caused by: org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '[FOUR, ONE, TWO, SIX, FIVE, THREE]' with class 'java.util.ImmutableCollections$SetN' to class 'java.util.EnumSet' due to: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.util.EnumSet(test.Test1, test.Test1, test.Test1, test.Test1, test.Test1, test.Test1)
    at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:402)
    at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnNumber(DefaultTypeTransformation.java:315)
    at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnCollection(DefaultTypeTransformation.java:273)
    at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:230)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:615)
    at test.Test1.<clinit>(Application.groovy:14)
    ... 13 more
    Suppressed: groovy.lang.GroovyRuntimeException: Could not find matching constructor for: java.util.EnumSet(SetN)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1835)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1605)
        at org.codehaus.groovy.runtime.InvokerHelper.invokeConstructorOf(InvokerHelper.java:1067)
        at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.continueCastOnSAM(DefaultTypeTransformation.java:378)
        ... 18 more

Although it is working fine in groovy 4 in all JDK: 8, 11 and 17.

 

Groovy\JDK	JDK8	jdk-11.0.19+7	jdk-17.0.7+7
2.4.21	V	N/A	N/A
2.5.22	V	X	X
3.0.17	V	X	X
4.0.12	V	V	V

Also, static compilation of enum is also fixing the problem. I am using CentOS 7 and AdoptNet(Temurin) Java, see versions of groovy and java in the table above.

 

Issue Links

• relates to: GROOVY-8164 Groovy allows a Java class to inherit static methods from its interface