GradleException when multiple goals leave behind spotless-clean dir

リンクされている openapi-generator-client プロジェクトで次のシーケンスを再現することから始めます: gradle clean openApiGenerate spotlessApply。続けて gradle spotlessCheck または gradle build を実行します。生成された build/spotless-clean/spotlessJava/build/generate-resources/main/src/main/java/ ディレクトリを調べ、別途 spotlessApply を実行した場合、または明示的なターゲットを指定した場合の動作と比較します。後続のチェックまたはビルドが手動でクリーンアップせずに成功すれば完了です。

In my project: https://github.com/sixcorners/openapi-generator-client/tree/7b2dfb9cda3fe366f0a45f76b60b1a1961311d65
If you run
gradle clean openApiGenerate spotlessApply
it leaves behind a build/spotless-clean/spotlessJava/build/generate-resources/main/src/main/java/ directory. If you then run gradle spotlessCheck or gradle build it throws an error:

Caused by: org.gradle.api.GradleException: There were 0 lint error(s), they must be fixed or suppressed.
Resolve these lints or suppress with `suppressLintsFor`
        at com.diffplug.gradle.spotless.SpotlessCheck.performAction(SpotlessCheck.java:85)
        at com.diffplug.gradle.spotless.SpotlessCheck.performAction(SpotlessCheck.java:57)

if you delete build/spotless-clean or just run gradle spotlessApply again then gradle build works again.
kind of annoying but it's not a big deal.
specifying the target manually also fixes it.

spotless {
  java {
    googleJavaFormat()
    target("src/main/java", "build/generate-resources/main/src/main/java")
  }
  kotlinGradle { ktfmt() }
}

I kind of thought the bug was something else but that disappeared so I kind of wonder if this can even be reproduced on other people's machines or if it will disappear too. It's also not a big deal since you can just run gradle spotlessApply in it's own cli invocation. Also running the build gradle goal in IntelliJ doesn't reproduce the issue. It's very fiddly. If you have trouble reproducing it I wouldn't mind if you just close this issue and leave it as a place for other people to find if they have something similar happen.
This is my gradle version running in a snap:

$ gradle --version

------------------------------------------------------------
Gradle 9.6.1
------------------------------------------------------------

Build time:    2026-06-26 14:25:50 UTC
Revision:      309d128bd9fe8c0b71311878fc660b9cbaa07c51

Kotlin:        2.3.21
Groovy:        4.0.32
Ant:           Apache Ant(TM) version 1.10.17 compiled on April 6 2026
Launcher JVM:  25.0.3 (Ubuntu 25.0.3+9-2-26.04.2-Ubuntu)
Daemon JVM:    /usr/lib/jvm/java-25-openjdk-amd64 (no Daemon JVM specified, using current Java home)
OS:            Linux 7.0.0-27-generic amd64