Gradle bug: Moving file creation from processResources to a dependency will remove the generated file

build.gradle

apply plugin: 'java'

task(copyInput, type: Copy) {
    from 'input.txt'
    into "${sourceSets.main.output.resourcesDir}"
}

processResources {
    //dependsOn copyInput // Enable this line after first execution
    from 'input.txt'      // Disable this line after first execution

    from 'anotherInput.txt'
}

console.log

$ gradle clean processResources
:clean
:processResources

BUILD SUCCESSFUL

Total time: 2.119 secs

$ ls build/resources/main/input.txt
build/resources/main/input.txt

$ # Modify build.gradle here, by enabling line 9 and disabling line 10. 

$ gradle clean processResources
:clean
:copyInput
:processResources

BUILD SUCCESSFUL

Total time: 2.895 secs

$ ls build/resources/main/input.txt
ls: build/resources/main/input.txt: No such file or directory

$ # File should exist!

$ gradle clean processResources
:clean
:copyInput
:processResources

BUILD SUCCESSFUL

Total time: 2.036 secs

$ ls build/resources/main/input.txt
build/resources/main/input.txt