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Not sure if it makes any difference but my project is a multi-module project, and I have this line in the root project's settings file

What version of Gradle do you use? Could you please post a stack trace of the failure? Are there any included builds or buildSrc project involved?

thanks for your reply version 8.4 Here is most of the stacktrace

* Exception is:
org.gradle.api.InvalidUserCodeException: Cannot change default excludes during the build. They were changed from [**/#*#, **/%*%, **/*~, **/.#*, **/.DS_Store, **/._*, **/.bzr, **/.bzr/**, **/.bzrignore, **/.cvsignore, **/.git, **/.git/**, **/.gitattributes, **/.gitmodules, **/.hg, **/.hg/**, **/.hgignore, **/.hgsub, **/.hgsubstate, **/.hgtags, **/.svn, **/.svn/**, **/CVS, **/CVS/**, **/SCCS, **/SCCS/**, **/vssver.scc] to [**/#*#, **/%*%, **/*~, **/.#*, **/.DS_Store, **/._*, **/.bzr, **/.bzr/**, **/.bzrignore, **/.cvsignore, **/.git, **/.git/**, **/.gitattributes, **/.gitignore, **/.gitmodules, **/.hg, **/.hg/**, **/.hgignore, **/.hgsub, **/.hgsubstate, **/.hgtags, **/.svn, **/.svn/**, **/CVS, **/CVS/**, **/SCCS, **/SCCS/**, **/vssver.scc]. Configure default excludes in the settings script instead.
        at org.gradle.api.tasks.util.internal.PatternSpecFactory.failOnChangedDefaultExcludes(PatternSpecFactory.java:110)
        at org.gradle.api.tasks.util.internal.PatternSpecFactory.getDefaultExcludeSpec(PatternSpecFactory.java:95)
        at org.gradle.api.tasks.util.internal.PatternSpecFactory.createExcludeSpec(PatternSpecFactory.java:80)
        at org.gradle.api.tasks.util.internal.PatternSpecFactory.createSpec(PatternSpecFactory.java:58)
        at org.gradle.api.tasks.util.PatternSet.getAsSpec(PatternSet.java:165)
        at org.gradle.internal.fingerprint.impl.PatternSetSnapshottingFilter.getAsSnapshotPredicate(PatternSetSnapshottingFilter.java:57)
        at org.gradle.internal.vfs.impl.DefaultFileSystemAccess.lambda$read$6(DefaultFileSystemAccess.java:127)
        at org.gradle.internal.vfs.impl.DefaultFileSystemAccess.readSnapshotFromLocation(DefaultFileSystemAccess.java:182)
        at org.gradle.internal.vfs.impl.DefaultFileSystemAccess.read(DefaultFileSystemAccess.java:126)
        at org.gradle.internal.fingerprint.impl.DefaultFileCollectionSnapshotter$SnapshottingVisitor.visitFileTree(DefaultFileCollectionSnapshotter.java:76)
        at org.gradle.api.internal.file.collections.FileTreeAdapter$1.visitFileTree(FileTreeAdapter.java:125)
        at org.gradle.api.internal.file.collections.DirectoryFileTree.visitStructure(DirectoryFileTree.java:106)
        at org.gradle.api.internal.file.collections.FileTreeAdapter.visitContents(FileTreeAdapter.java:121)
        at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:366)
        at org.gradle.api.internal.file.CompositeFileCollection.lambda$visitContents$0(CompositeFileCollection.java:133)
        at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:67)
        at org.gradle.api.internal.file.collections.UnpackingVisitor.add(UnpackingVisitor.java:100)
        at org.gradle.api.internal.file.DefaultFileCollectionFactory$ResolvingFileCollection.visitChildren(DefaultFileCollectionFactory.java:285)
        at org.gradle.api.internal.file.CompositeFileCollection.visitContents(CompositeFileCollection.java:133)
        at org.gradle.api.internal.file.AbstractFileCollection.visitStructure(AbstractFileCollection.java:366)
        at org.gradle.internal.fingerprint.impl.DefaultFileCollectionSnapshotter.snapshot(DefaultFileCollectionSnapshotter.java:47)
        at org.gradle.internal.fingerprint.impl.AbstractFileCollectionFingerprinter.fingerprint(AbstractFileCollectionFingerprinter.java:46)
        at org.gradle.configurationcache.fingerprint.ConfigurationCacheFingerprintController$CacheFingerprintCheckerHost.fingerprintOf(ConfigurationCacheFingerprintController.kt:411)
        at org.gradle.configurationcache.fingerprint.ConfigurationCacheFingerprintChecker.check(ConfigurationCacheFingerprintChecker.kt:155)
        at org.gradle.configurationcache.fingerprint.ConfigurationCacheFingerprintChecker.checkBuildScopedFingerprint(ConfigurationCacheFingerprintChecker.kt:73)
        at org.gradle.configurationcache.fingerprint.ConfigurationCacheFingerprintController.checkBuildScopedFingerprint(ConfigurationCacheFingerprintController.kt:280)
        at org.gradle.configurationcache.DefaultConfigurationCache$checkBuildScopedFingerprint$1.invokeSuspend(DefaultConfigurationCache.kt:493)
        at org.gradle.configurationcache.DefaultConfigurationCache$checkBuildScopedFingerprint$1.invoke(DefaultConfigurationCache.kt)
        at org.gradle.configurationcache.DefaultConfigurationCache$checkBuildScopedFingerprint$1.invoke(DefaultConfigurationCache.kt)
        at org.gradle.configurationcache.DefaultConfigurationCache$readFingerprintFile$2$1.invokeSuspend(DefaultConfigurationCache.kt:512)
        at org.gradle.configurationcache.DefaultConfigurationCache$readFingerprintFile$2$1.invoke(DefaultConfigurationCache.kt)
        at org.gradle.configurationcache.DefaultConfigurationCache$readFingerprintFile$2$1.invoke(DefaultConfigurationCache.kt)
        at org.gradle.configurationcache.ConfigurationCacheIO$withReadContextFor$1$1$1$1.invokeSuspend(ConfigurationCacheIO.kt:257)
        at org.gradle.configurationcache.ConfigurationCacheIO$withReadContextFor$1$1$1$1.invoke(ConfigurationCacheIO.kt)
        at org.gradle.configurationcache.ConfigurationCacheIO$withReadContextFor$1$1$1$1.invoke(ConfigurationCacheIO.kt)
        at org.gradle.configurationcache.serialization.RunningKt$runReadOperation$2.invokeSuspend(Running.kt:34)

Yeah, that's incompatible with configuration cache afair. Don't know whether there is an open issues already. But just having that line in a minimal build already triggers the error. If there is no issue yet, you should probably report one. Maybe you can work-around it using a

ValueSource

, but I never tried that.

Ah ok 😞 thanks for looking though! I'll check if there's an open issue.

As @Mikhail Lopatkin was unaware of the issue, I guess there is not. 😄

We definitely tried to fix the excludes with CC for 8.1 and I recall it working https://github.com/gradle/gradle/issues/13665

I just tried with 8.1.1 and it is failing the same though

Oh, now I see; the trick is to run e.g.

compileJava

and not just

help

Ah yes, sorry I should have said

Yep, or

processTestResources

, or

processResources

, or just

build

I suspect we assumed that

DirectoryScanner.resetDefaultExcludes();

resets excludes to nothing, which it doesn't

Yeah, no, reset resets to the built-in default

Most likely, yes. And, looking at the stacktrace, we're probably prone to having incorrect excludes when checking cache fingerprint, because it is restored later 😞 I'll take it from here. Thank you for the report and help with the reproducer, and sorry for the feature not working correctly.

No problem. Thanks for your prompt responses 🙂 Do you need me to create an issue or will you create one? Just so I can watch the progress on this.

Here is the issue: https://github.com/gradle/gradle/issues/27225

Thanks