Silent breakage of basic spock test (uncomment any line to break it)

output

Output in test is OK...
Output in setup is OK...
Output in expect is OK...
JUnit 4 Runner, Tests: 1, Failures: 0, Time: 786

spock.groovy

@Grab('org.spockframework:spock-core:0.7-groovy-2.0')
import spock.lang.Specification

// println "Output in body NOT OK (tests never run)"
class mySpec extends Specification {
  def "goTime"() {
    println "Output in test is OK..."

    setup:
    println "Output in setup is OK..."

    expect:
    println "Output in expect is OK..."
    1 + 1 == 2
  }
}
// println "Output in body NOT OK (tests never run)"
// def whatever() { println "Output in whatever() never happens..." }