Ktlint: Exception in thread "main" java.lang.NoSuchFieldError: FUN_KEYWORD

[lechen26]

After upgrade ktlint to 38.1 (from 37.2) we get the following error:

> Task :ktlintFormat
Exception in thread "main" java.lang.NoSuchFieldError: FUN_KEYWORD
        at com.pinterest.ktlint.core.ast.ElementType.<clinit>(ElementType.kt:154)
        at com.pinterest.ktlint.ruleset.experimental.SpacingAroundAngleBracketsRule.<clinit>(SpacingAroundAngleBracketsRule.kt:94)
        at com.pinterest.ktlint.ruleset.experimental.ExperimentalRuleSetProvider.get(ExperimentalRuleSetProvider.kt:18)
        at com.pinterest.ktlint.KtlintCommandLine.loadRulesets(Main.kt:550)
        at com.pinterest.ktlint.KtlintCommandLine.run(Main.kt:222)
        at com.pinterest.ktlint.Main.main(Main.kt:62)

thanks
Chen

[romtsn]

Have you also updated kotlin to 1.4?

[zarebski-m]

I also get this error with ktlint 0.38.1 and Kotlin 1.4.0. No problem with Kotlin 1.3.72.

> Task :module:ktlintKotlinScriptCheck FAILED
Exception in thread "main" java.lang.NoSuchFieldError: FUN_KEYWORD
        at com.pinterest.ktlint.core.ast.ElementType.<clinit>(ElementType.kt:154)
        at com.pinterest.ktlint.ruleset.experimental.SpacingAroundAngleBracketsRule.<clinit>(SpacingAroundAngleBracketsRule.kt:94)
        at com.pinterest.ktlint.ruleset.experimental.ExperimentalRuleSetProvider.get(ExperimentalRuleSetProvider.kt:18)
        at com.pinterest.ktlint.KtlintCommandLine.loadRulesets(Main.kt:550)
        at com.pinterest.ktlint.KtlintCommandLine.run(Main.kt:222)
        at com.pinterest.ktlint.Main.main(Main.kt:62)

[eheinen]

Yeah, same here. I upgraded Kotlin to 1.4.0 and I cannot run the klint check anymore using Gradle.

[Tapchicoma]

Do you have .gradle.kts files in your project?

[Tapchicoma]

Could you attach here file that failing with above error?

[zarebski-m]

I don't know if this is helpful, but ktlint fails on the following file (which is part of a bigger multi-module project):

plugins {
    application
    id("org.springframework.boot")
    id("com.gorylenko.gradle-git-properties")
}

dependencies {
    implementation("org.springframework.boot:spring-boot-starter-data-mongodb")
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("org.springframework.cloud:spring-cloud-starter-stream-rabbit")
    implementation("org.springframework.cloud:spring-cloud-starter-vault-config")
    implementation("org.springframework.boot:spring-boot-starter-actuator")
    implementation("io.sentry:sentry-logback")
    implementation("mysql:mysql-connector-java")

    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("org.springframework.cloud:spring-cloud-stream-test-support")
    testImplementation("org.spockframework:spock-core")
    testImplementation("org.spockframework:spock-spring")
    testImplementation("com.h2database:h2")

    compileOnly("org.projectlombok:lombok")
    annotationProcessor("org.projectlombok:lombok")
    annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
}

springBoot {
    buildInfo()
}

application {
    mainClassName = "XXX" // redacted
}

tasks {
    jar { enabled = true }
    bootJar { archiveClassifier.set("app") }
    processResources {
        filesMatching(listOf("sentry.properties")) {
            expand(project.properties)
        }
    }
}

What might be helpful as well is that I'm not using pinterest/ktlint directly, but rather via JLLeitschuh/ktlint-gradle with the following configuration:

ktlint {
    version.set("0.38.1")
    verbose.set(true)
    disabledRules.set(setOf("import-ordering", "no-wildcard-imports"))
}

[Tapchicoma]

I could reproduce it as well on my work project. Most probably related to ktlint-gradle plugin and not KtLint itself.

[Tapchicoma]

Please check this comment in ktlint-gradle: https://github.com/JLLeitschuh/ktlint-gradle/issues/383#issuecomment-686755121

Most probably this is your case and why it is not working.