Spock Framework - Core Module errors

Spock is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language. Thanks to its JUnit runner, Spock is compatible with most IDEs, build tools, and continuous integration servers. Spock is inspired from JUnit, jMock, RSpec, Groovy, Scala, Vulcans, and other fascinating life forms.

http://spockframework.org
Solution coverage:
Summary coverage:

Nothing to list here.
Package namePatterns foundSolution coverageSummary coverage
org.spockframework.runtime141
org.spockframework.runtime.extension81
org.spockframework.mock.runtime40
org.spockframework.lang26
org.spockframework.mock8
org.spockframework.util5
spock.mock3
spock.lang3
org.spockframework.runtime.model2
org.spockframework.runtime.extension.builtin1
org.spockframework.compiler1
Package nameClass namePatterns foundSolution coverageSummary coverage
org.spockframework.langSpecInternals26
Package nameClass nameMethod namePatterns foundSolution coverage
org.spockframework.langSpecInternalscreateMockImpl12
org.spockframework.langSpecInternalsMockImpl11
org.spockframework.langSpecInternalsSpyImpl2
org.spockframework.langSpecInternalscreateMock1
Package nameClass nameMethod nameException TypePatterns foundSolution coverage
org.spockframework.langSpecInternalsMockImplCannotCreateMockException4
org.spockframework.langSpecInternalsMockImplInvalidSpecException2
org.spockframework.langSpecInternalsMockImplIllegalArgumentException2
org.spockframework.langSpecInternalsMockImplVerifyError1
org.spockframework.langSpecInternalsMockImplNoSuchMethodError1
org.spockframework.langSpecInternalsMockImplNoClassDefFoundError1