When attempt to validate container element, the validator throws IllegalArgumentException for bounded wildcard type parameter
```
{code} @Data
public class X {
@Size(min = 2, max = 2) @NotNull List<? extends BigDecimal> positioned;
} {code}
```
{quote} Throw exceptions
```
java.lang.IllegalArgumentException: HV000116: type is not a reference type: ? extends java.math.BigDecimal
at org.hibernate.validator.internal.util.Contracts.assertTrue(Contracts.java:73)
at org.hibernate.validator.internal.util.TypeHelper.getErasedReferenceType(TypeHelper.java:193)
at org.hibernate.validator.internal.metadata.core.MetaConstraints.addValueExtractorDescriptorForWrappedValue(MetaConstraints.java:82)
at org.hibernate.validator.internal.metadata.core.MetaConstraints.create(MetaConstraints.java:55)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.createTypeArgumentMetaConstraint(AnnotationMetaDataProvider.java:795)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.lambda$findTypeUseConstraints$2(AnnotationMetaDataProvider.java:783)
at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findTypeUseConstraints(AnnotationMetaDataProvider.java:784)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findTypeArgumentsConstraints(AnnotationMetaDataProvider.java:762)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findTypeAnnotationConstraintsForExecutableParameter(AnnotationMetaDataProvider.java:716)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getParameterMetaData(AnnotationMetaDataProvider.java:429)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findExecutableMetaData(AnnotationMetaDataProvider.java:300)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMetaData(AnnotationMetaDataProvider.java:285)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMethodMetaData(AnnotationMetaDataProvider.java:272)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.retrieveBeanConfiguration(AnnotationMetaDataProvider.java:134)
at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getBeanConfiguration(AnnotationMetaDataProvider.java:124)
at org.hibernate.validator.internal.metadata.BeanMetaDataManager.getBeanConfigurationForHierarchy(BeanMetaDataManager.java:232)
at org.hibernate.validator.internal.metadata.BeanMetaDataManager.createBeanMetaData(BeanMetaDataManager.java:199)
at org.hibernate.validator.internal.metadata.BeanMetaDataManager.getBeanMetaData(BeanMetaDataManager.java:166)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:265)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:233)
at org.springframework.validation.beanvalidation.MethodValidationInterceptor.invoke(MethodValidationInterceptor.java:112)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
``` {quote}
The root cause is the assert at \ [TypeHelper#isReferenceType]( [ https://github.com/hibernate/hibernate-validator/blob/master/engine/src/main/java/org/hibernate/validator/internal/util/TypeHelper.java#L549) |https://github.com/hibernate/hibernate-validator/blob/master/engine/src/main/java/org/hibernate/validator/internal/util/TypeHelper.java#L549)] which does not return `true` for WildcardType |
|
