Disable Error Prone on JDK 26

Issue: google/error-prone#5200

Author: marcphilipp

gradle/libs.versions.toml

@@ -34,7 +34,10 @@ bndlib = { module = "biz.aQute.bnd:biz.aQute.bndlib", version.ref = "bnd" }
 checkstyle = { module = "com.puppycrawl.tools:checkstyle", version.ref = "checkstyle" }
 classgraph = { module = "io.github.classgraph:classgraph", version = "4.8.181" }
 commons-io = { module = "commons-io:commons-io", version = "2.20.0" }
+
+# check whether JDK 26 condition in junitbuild.java-nullability-conventions.gradle.kts can be removed when updating
 errorProne-core = { module = "com.google.errorprone:error_prone_core", version = "2.41.0" }
+
 fastcsv = { module = "de.siegmar:fastcsv", version = "4.0.0" }
 groovy4 = { module = "org.apache.groovy:groovy", version = "4.0.28" }
 groovy2-bom = { module = "org.codehaus.groovy:groovy-bom", version = "2.5.23" }

gradle/plugins/common/src/main/kotlin/junitbuild.java-nullability-conventions.gradle.kts

@@ -28,7 +28,10 @@ nullaway {
 tasks.withType<JavaCompile>().configureEach {
 	options.errorprone {
 		val onJ9 = java.toolchain.implementation.orNull == JvmImplementation.J9
-		if (name == "compileJava" && !onJ9) {
+		// Workaround for https://github.com/google/error-prone/issues/5200
+		val onJdk26 = java.toolchain.languageVersion.get() >= JavaLanguageVersion.of(26)
+		val shouldDisableErrorProne = onJ9 || onJdk26
+		if (name == "compileJava" && !shouldDisableErrorProne) {
 			disable(
 
 				// This check is opinionated wrt. which method names it considers unsuitable for import which includes
@@ -56,7 +59,7 @@ tasks.withType<JavaCompile>().configureEach {
 			disableAllChecks = true
 		}
 		nullaway {
-			if (onJ9) {
+			if (shouldDisableErrorProne) {
 				disable()
 			} else {
 				enable()