Illegal reflective access operation with Kotlin 1.5.0

[obsantos]

Expected Behavior

ktlint should run without illegal reflective access warnings.

Observed Behavior

When running ktlint while using Kotlin 1.5.0 it outputs the following warning:

WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jetbrains.kotlin.com.intellij.util.ReflectionUtil (file:/Users/obustosantos/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-compiler-embeddable/1.4.31/6451ea797cef544e81f507b0d9959cd97ae09c0/kotlin-compiler-embeddable-1.4.31.jar) to method java.util.ResourceBundle.setParent(java.util.ResourceBundle)
WARNING: Please consider reporting this to the maintainers of org.jetbrains.kotlin.com.intellij.util.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

Other than the warning, ktlint works and detects issues in the code

Steps to Reproduce

• Run a clean to avoid incremental analysis: ./gradlew clean
• Run ./gradlew ktlint and observe warning

Your Environment

• Version of ktlint used: 0.41.0
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task):

Default implementation from the README

task ktlint(type: JavaExec, group: "verification") {
    inputs.files(inputFiles)
    outputs.dir(outputDir)
    description = "Check Kotlin code style."
    classpath = configurations.ktlint
    main = "com.pinterest.ktlint.Main"
    args "src/**/*.kt", "--reporter=plain", "--reporter=checkstyle,output=${outputFile}"
}

• Version of Gradle used (if applicable): 7.0 (Android Gradle Plugin 4.2.0)
• Operating System and version: macOS Mojave
• Link to your project (if it's a public repository): Private repo

Seems to be related to this https://youtrack.jetbrains.com/issue/KT-43704 that states:

Affected versions	1.4.20, 1.4.21
Fix in builds	1.5.20-dev-27, 1.5.0-M1-10, 1.5.20-M1-30

Could be similar solution as suggested in #1142 but since output is different and in my case it's just a warning (ktlint still works) decided to create new issue

[itsandreramon]

I have the same issue on 1.4.32 with an M1 Mac and ktlint 0.41.0 (it reports 1.4.31 even though I am using 1.4.32).

Task :common-ui-compose:ktlintFormat FAILED
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jetbrains.kotlin.com.intellij.util.ReflectionUtil (file:/Users/andrethiele/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-compiler-embeddable/1.4.31/6451ea797cef544e81f507b0d9959cd97ae09c0/kotlin-compiler-embeddable-1.4.31.jar) to method java.util.ResourceBundle.setParent(java.util.ResourceBundle)

Edit: No error on ktlint 0.40.0

[obsantos]

@itsandreramon yea because they are using 1.4.31
https://github.com/pinterest/ktlint/blob/master/build.gradle#L7

I guess we need a new version of ktlint using the latest

[obsantos]

Looks like the fix has been merged #1175 but no new version has been published yet

[magneticflux-]

I frequently use Java 16 on the command line and have to explicitly switch to Java 8 so ktlint works because of KT-45566. A new release using Kotlin 1.5.20 would be fantastic!

[ipat500]

As far as I can tell this seems to be fixed as of ktlint 0.42.1

[obsantos]

As far as I can tell this seems to be fixed as of ktlint 0.42.1

You are right, seems that the have fixed it

'kotlin': gradle.ext.isKotlinDev ? "1.5.30-RC" : "1.5.20",

Closing

[fzyzcjy]

I still observe the error...

java -jar /Users/tom/opt/ktlint-0.44.0-20220123.092956-49-all.jar  --format xxxxxx
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.jetbrains.kotlin.com.intellij.util.ReflectionUtil (file:/Users/tom/opt/ktlint-0.44.0-20220123.092956-49-all.jar) to field java.lang.Throwable.backtrace
WARNING: Please consider reporting this to the maintainers of org.jetbrains.kotlin.com.intellij.util.ReflectionUtil
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
ktlint --version
0.43.2

[carmen-gh]

and in version 0.45.1 too