I have a project that that uses Gradle. (It's a multiplatform Kotlin project). When I run `gradle war` (from a shell or from within IntelliJ) it creates some files in the `build` folder (as expected) and then IntelliJ starts churning, indexing something in that folder (see screenshot). But `build` is invisible in my project navigator and marked as "excluded" in my module settings, as it should be. Is this a bug? IntelliJ should not be indexing the build output, correct?