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https://issues.apache.org/jira/browse/GROOVY-10553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17514150#comment-17514150
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Christopher Smith commented on GROOVY-10553:
--------------------------------------------
To clarify (I don't think I included a stack trace but can), I'm getting a
JVM Error-free subclass indicating an illegal duplication of an annotation
(i.e., not rolled up into a container annotation) on invocation of a
built-in reflection method. It's merely that this isn't inspected until HV
queries it.
> Regression: Annotation on trait field is illegally duplicated
> -------------------------------------------------------------
>
> Key: GROOVY-10553
> URL: https://issues.apache.org/jira/browse/GROOVY-10553
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 4.0.1
> Reporter: Christopher Smith
> Assignee: Eric Milles
> Priority: Critical
>
> I have the following types:
> {code}
> trait ShipmentRelated {
> @NotBlank
> String shipmentId
> }
> class ShipmentLocationRequest extends Base implements ShipmentRelated {}
> {code}
> In Groovy 3, this compiles correctly:
> {code}
> private java.lang.String com_example_logistics_ShipmentRelated__shipmentId;
> descriptor: Ljava/lang/String;
> flags: (0x0002) ACC_PRIVATE
> RuntimeVisibleAnnotations:
> 0: #17() javax.validation.constraints.NotBlank
> {code}
> In Groovy 4 with identical source, I get duplicate annotations (annotation
> sections?):
> {code}
> private java.lang.String com_example_logistics_ShipmentRelated__shipmentId;
> descriptor: Ljava/lang/String;
> flags: (0x0002) ACC_PRIVATE
> RuntimeVisibleAnnotations:
> 0: #17() javax.validation.constraints.NotBlank
> RuntimeVisibleTypeAnnotations:
> 0: #17(): FIELD javax.validation.constraints.NotBlank
> {code}
> This causes an {{AnnotationFormatError}} at runtime.
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