DefaultBuildTreeWorkGraph previous = current.get();
        DefaultBuildTreeWorkGraph workGraph = new DefaultBuildTreeWorkGraph();
        current.set(workGraph);
        try {
            try {
                return action.apply(workGraph);
            } finally {
                workGraph.close();
            }
        } finally {
            current.set(previous);
        }
    }

                    }
                });
            }
            currentOwner = Thread.currentThread();
            DefaultBuildWorkGraph workGraph = new DefaultBuildWorkGraph();
            pendingGraphs.add(workGraph);
            return workGraph;
        }
    }

    private DefaultExportedTaskNode doLocate(TaskIdentifier taskIdentifier) {

        t3 == failure
    }

    void testCanExecuteTasksWhenNothingHasBeenScheduled() {
        when:
        def controller = controller()
        def workGraph = controller.newWorkGraph()
        def result = controller.executeTasks(workGraph)

        then:
        result.failures.empty

        when:
        def finishResult = controller.finishBuild(null)

        then:

            readRequiredBuildServicesOf(gradle)

            val workGraph = readWorkGraph(gradle)
            readFlowScopeOf(gradle)
            readBuildOutputCleanupRegistrations(gradle)
            return BuildWithWork(build.state.identityPath, build, gradle.rootProject.name, projects, workGraph)
        } else {
            return BuildWithNoProjects(build.state.identityPath)
        }
    }

        return loadFromCache(StateType.Work) { stateFile ->
            val (buildInvocationId, workGraph) = cacheIO.readRootBuildStateFrom(stateFile, loadAfterStore, graph, graphBuilder)
            LoadResult(stateFile.stateFile.file, buildInvocationId) to workGraph
        }
    }

    private

.src/einstein.txt
[source,text]
----
include::{snippetsPath}/workerApi/md5CustomTask/groovy/src/einstein.txt[]
----

.src/feynman.txt
[source,text]
----
include::{snippetsPath}/workerApi/md5CustomTask/groovy/src/feynman.txt[]
----

.src/hawking.txt
[source,text]
----
include::{snippetsPath}/workerApi/md5CustomTask/groovy/src/hawking.txt[]
----