src/test/groovy/bugs/Groovy8084Bug.groovy

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package groovy.bugs

import gls.CompilableTestSupport
import groovy.test.NotYetImplemented

class Groovy8084Bug extends CompilableTestSupport {
    // TODO REFINE ME
    void testGroovy8084Bug() {
        assertScript '''
            import groovy.transform.CompileStatic

            @CompileStatic
            static def method(List<? extends Serializable> captured) {
                captured.add('some string') // though the test passes now, but I expect a STC error here because of adding an element to a producer, which is not allowed in Java 
                return captured
            }
            
            println method(new ArrayList<Integer>())
        '''
    }
}