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                                        <table class="page-title-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0; mso-table-rspace: 0"> 
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                                                    <td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HV?atlOrigin=eyJpIjoiZTNhYTY2OWYxNjAwNDVhNGE1ZDZkOWI3YjgxZjI3MWQiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate Validator</a> / <a href="https://hibernate.atlassian.net/browse/HV-1796?atlOrigin=eyJpIjoiZTNhYTY2OWYxNjAwNDVhNGE1ZDZkOWI3YjgxZjI3MWQiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-fab585d7-a0be-4e06-a217-c71260708f07" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HV-1796?atlOrigin=eyJpIjoiZTNhYTY2OWYxNjAwNDVhNGE1ZDZkOWI3YjgxZjI3MWQiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HV-1796</a> </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-fab585d7-a0be-4e06-a217-c71260708f07" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 6.0.18.Final, 6.1.5.Final </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Assignee:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Attachments:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> image-2020-08-05-00-24-18-321.png </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> engine </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 04/Aug/2020 09:41 AM </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Environment:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Hibernate Validator 6.1.5.Final <br> zulu11.35.15-ca-jdk11.0.5-win_x64 (observed against IBM Java 8 too) <br> Kotlin 1.3.72 <br> Gradle 6.5.1 <br> Windows 10 </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Priority:</th> 
                                                    <td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-minor-6c0f4922-f122-4ad5-8c89-26bb3e4eb376" height="16" width="16" border="0" align="absmiddle" alt="Minor" style="vertical-align: text-bottom"> Minor </td> 
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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Reporter:</th> 
                                                    <td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="frdricchuong" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_frdricchuong" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%3A4ca290af-dd15-4cd2-ba2d-7a48f3908c1f"> Frédéric Chuong </a> </td> 
                                                </tr> 
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                                    <td class="email-content-main mobile-expand  issue-description-container" style="padding: 0; border-collapse: collapse; border-left: 1px solid #cccccc; border-right: 1px solid #cccccc; border-top: 0; border-bottom: 0; padding: 0 15px 0 16px; background-color: #ffffff; padding-top: 5px; padding-bottom: 10px" bgcolor="#ffffff"> 
                                        <table class="text-paragraph-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0; mso-table-rspace: 0; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 2px"> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <h1 style="margin: 10px 0 0; margin-top: 0; font-size: 24px; font-weight: normal; line-height: 1.250; margin: 40px 0 0; margin-top: 0"><a name="Context" style="color: #3b73af; text-decoration: none"></a>Context</h1> 
                                                        <ul> 
                                                            <li>Method constraints validation</li> 
                                                            <li>Kotlin 
                                                                <ul> 
                                                                    <li>Presence of extension function on parameterized type within the validated object</li> 
                                                                </ul> </li> 
                                                        </ul> <h1 style="margin: 10px 0 0; font-size: 24px; font-weight: normal; line-height: 1.250; margin: 40px 0 0"><a name="Problem" style="color: #3b73af; text-decoration: none"></a>Problem</h1> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Given the following code making use of method constraint validation</p> 
                                                        <div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
                                                            <div class="codeHeader panelHeader" style="border-bottom-width: 1px;; border-bottom: 1px solid #cccccc; padding: 9px 12px">
                                                                <b>SimpleFooService.kt</b>
                                                            </div>
                                                            <div class="codeContent panelContent" style="padding: 9px 12px"> 
                                                                <pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">package</span> foo

<span class="code-keyword" style="color: #000091">import</span> org.slf4j.LoggerFactory
<span class="code-keyword" style="color: #000091">import</span> javax.validation.Validation
<span class="code-keyword" style="color: #000091">import</span> javax.validation.constraints.NotEmpty

<span class="code-keyword" style="color: #000091">class </span>SimpleFooService {
    fun methodName(@NotEmpty ignored: <span class="code-object" style="color: #910091">String</span>) {
        <span class="code-comment" style="color: #808080">// no-op
</span>    }

    <span class="code-keyword" style="color: #000091">private</span> fun List&lt;<span class="code-object" style="color: #910091">String</span>&gt;.someExtensionFunction(extensionFunctionArg: Int) = Unit
}

fun main() {
    val validator = Validation.buildDefaultValidatorFactory().validator
    val executableValidator = validator.forExecutables()
    <span class="code-keyword" style="color: #000091">try</span> {
        executableValidator.validateParameters(
            SimpleFooService(),
            SimpleFooService::<span class="code-keyword" style="color: #000091">class.</span>java.getDeclaredMethod(SimpleFooService::methodName.name, <span class="code-object" style="color: #910091">String</span>::<span class="code-keyword" style="color: #000091">class.</span>java),
            arrayOf(<span class="code-quote" style="color: #009100">"Some value"</span>)
        )
    } <span class="code-keyword" style="color: #000091">catch</span> (e: Exception) {
        log.error(<span class="code-quote" style="color: #009100">"Error"</span>, e)
    }
}

val log = LoggerFactory.getLogger(SimpleFooService::<span class="code-keyword" style="color: #000091">class.</span>java)
</pre> 
                                                            </div>
                                                        </div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Attempting to execute the code leads to <tt>ArrayIndexOutOfBoundsException</tt> and the given arguments not being validated:</p> 
                                                        <div class="preformatted panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
                                                            <div class="preformattedContent panelContent" style="padding: 9px 12px"> 
                                                                <pre style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">2020-08-04 16:14:41,937 [main] DEBUG - org.jboss.logging - Logging Provider: org.jboss.logging.Slf4jLoggerProvider
2020-08-04 16:14:41,949 [main]  INFO - org.hibernate.validator.internal.util.Version - HV000001: Hibernate Validator 6.1.5.Final
2020-08-04 16:14:41,975 [main] DEBUG - org.hibernate.validator.internal.xml.config.ValidationXmlParser - Trying to load META-INF/validation.xml for XML based Validator configuration.
2020-08-04 16:14:41,977 [main] DEBUG - org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via TCCL
2020-08-04 16:14:41,979 [main] DEBUG - org.hibernate.validator.internal.xml.config.ResourceLoaderHelper - Trying to load META-INF/validation.xml via Hibernate Validator's class loader
2020-08-04 16:14:41,980 [main] DEBUG - org.hibernate.validator.internal.xml.config.ValidationXmlParser - No META-INF/validation.xml found. Using annotation based configuration only.
2020-08-04 16:14:41,986 [main] DEBUG - org.hibernate.validator.internal.engine.resolver.TraversableResolvers - Cannot find javax.persistence.Persistence on classpath. Assuming non JPA 2 environment. All properties will per default be traversable.
2020-08-04 16:14:42,083 [main] DEBUG - org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator - Loaded expression factory via original TCCL
2020-08-04 16:14:42,434 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000252: Using org.hibernate.validator.internal.engine.DefaultPropertyNodeNameProvider as property node name provider.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator as ValidatorFactory-scoped message interpolator.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.resolver.TraverseAllTraversableResolver as ValidatorFactory-scoped traversable resolver.
2020-08-04 16:14:42,443 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.util.ExecutableParameterNameProvider as ValidatorFactory-scoped parameter name provider.
2020-08-04 16:14:42,444 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.DefaultClockProvider as ValidatorFactory-scoped clock provider.
2020-08-04 16:14:42,444 [main] DEBUG - org.hibernate.validator.internal.engine.ValidatorFactoryConfigurationHelper - HV000234: Using org.hibernate.validator.internal.engine.scripting.DefaultScriptEvaluatorFactory as ValidatorFactory-scoped script evaluator factory.
2020-08-04 16:14:42,541 [main] ERROR - foo.SimpleFooService - Error
java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getTypeParametersCascadingMetaDataForParameterizedType(AnnotationMetaDataProvider.java:678) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getTypeParametersCascadingMetadata(AnnotationMetaDataProvider.java:660) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findCascadingMetaData(AnnotationMetaDataProvider.java:627) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getParameterMetaData(AnnotationMetaDataProvider.java:432) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.findExecutableMetaData(AnnotationMetaDataProvider.java:308) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMetaData(AnnotationMetaDataProvider.java:292) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getMethodMetaData(AnnotationMetaDataProvider.java:279) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.retrieveBeanConfiguration(AnnotationMetaDataProvider.java:130) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider.getBeanConfiguration(AnnotationMetaDataProvider.java:120) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.getBeanConfigurationForHierarchy(BeanMetaDataManagerImpl.java:234) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.createBeanMetaData(BeanMetaDataManagerImpl.java:201) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.metadata.BeanMetaDataManagerImpl.getBeanMetaData(BeanMetaDataManagerImpl.java:165) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:267) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateParameters(ValidatorImpl.java:235) ~[hibernate-validator-6.1.5.Final.jar:6.1.5.Final]
        at foo.FooServiceKt.main(FooService.kt:19) ~[main/:na]
        at foo.FooServiceKt.main(FooService.kt) ~[main/:na]
</pre> 
                                                            </div>
                                                        </div> <h1 style="margin: 10px 0 0; font-size: 24px; font-weight: normal; line-height: 1.250; margin: 40px 0 0"><a name="Preliminaryanalysis" style="color: #3b73af; text-decoration: none"></a>Preliminary analysis</h1> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Debugging reveals that <a href="https://github.com/hibernate/hibernate-validator/blob/6.1.5.Final/engine/src/main/java/org/hibernate/validator/internal/metadata/provider/AnnotationMetaDataProvider.java#L307" class="external-link" rel="nofollow noreferrer" style="color: #3b73af; text-decoration: none"><tt>org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider#findExecutableMetaData</tt></a> is retrieving a incorrect <tt>JavaBeanExecutable</tt> result from <tt>JavaBeanHelper</tt> when processing the <tt>private final void foo.SimpleFooService.someExtensionFunction(java.util.List,int)</tt> method:</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"> <span class="image-wrap" style=""><a id="49727_thumb" href="https://hibernate.atlassian.net/secure/attachment/49727/49727_image-2020-08-05-00-24-18-321.png" title="https://hibernate.atlassian.net/secure/attachment/49727/49727_image-2020-08-05-00-24-18-321.png" file-preview-type="image" file-preview-id="49727" file-preview-title="https://hibernate.atlassian.net/secure/attachment/49727/49727_image-2020-08-05-00-24-18-321.png" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-982623c1-9450-448c-ac32-da4059a15bb3"></a></span> </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0"><img class="emoticon" src="cid:jira-generated-image-static-warning-2bd392d5-2426-4546-932c-2e0ebdf05593" height="16" width="16" align="absmiddle" alt="" border="0"> The <tt>extensionFunctionArg</tt> argument has the <tt>List&lt;String&gt;</tt> type associated to it, instead of <tt>int</tt></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">That inconsistency causes <tt>AnnotationMetaDataProvider.getTypeParametersCascadingMetaDataForParameterizedType</tt> to fail.</p> <h1 style="margin: 10px 0 0; font-size: 24px; font-weight: normal; line-height: 1.250; margin: 40px 0 0"><a name="Workaround" style="color: #3b73af; text-decoration: none"></a>Workaround</h1> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Workaround is to remove all extension functions on parameterized receiver from the validated class (which may not be desirable).</p> <h1 style="margin: 10px 0 0; font-size: 24px; font-weight: normal; line-height: 1.250; margin: 40px 0 0"><a name="Buildsetup" style="color: #3b73af; text-decoration: none"></a>Build setup</h1> 
                                                        <div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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                                                                <b>build.gradle.kts</b>
                                                            </div>
                                                            <div class="codeContent panelContent" style="padding: 9px 12px"> 
                                                                <pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">import</span> org.jetbrains.kotlin.gradle.dsl.KotlinCompile
<span class="code-keyword" style="color: #000091">import</span> org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions

plugins {
    kotlin(<span class="code-quote" style="color: #009100">"jvm"</span>) version <span class="code-quote" style="color: #009100">"1.3.72"</span>
}

group = <span class="code-quote" style="color: #009100">"org.example"</span>
version = <span class="code-quote" style="color: #009100">"1.0-SNAPSHOT"</span>

repositories {
    mavenCentral()
}

dependencies {
    implementation(kotlin(<span class="code-quote" style="color: #009100">"stdlib"</span>))
    implementation(platform(<span class="code-quote" style="color: #009100">"org.springframework.boot:spring-boot-dependencies:2.3.2.RELEASE"</span>))
    implementation(<span class="code-quote" style="color: #009100">"org.slf4j:slf4j-api"</span>)
    implementation(<span class="code-quote" style="color: #009100">"ch.qos.logback:logback-classic"</span>)
    implementation(<span class="code-quote" style="color: #009100">"org.hibernate.validator:hibernate-validator"</span>)
    implementation(<span class="code-quote" style="color: #009100">"org.glassfish:jakarta.el"</span>)
}

tasks {
    <span class="code-quote" style="color: #009100">"wrapper"</span>(Wrapper::class) {
        gradleVersion = <span class="code-quote" style="color: #009100">"6.5.1"</span>
        distributionType = Wrapper.DistributionType.ALL
    }
    withType&lt;KotlinCompile&lt;KotlinJvmOptions&gt;&gt;().configureEach {
        kotlinOptions {
            jvmTarget = <span class="code-quote" style="color: #009100">"11"</span>
            javaParameters = <span class="code-keyword" style="color: #000091">true</span>
        }
    }
}
</pre> 
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