// have an empty match: start.x==end.x and start.y==end.y.
		start := m
		for start.x > done.x && start.y > done.y && x[start.x-1] == y[start.y-1] {
			start.x--
			start.y--
		}
		end := m
		for end.x < len(x) && end.y < len(y) && x[end.x] == y[end.y] {
			end.x++
			end.y++
		}

		// Emit the mismatched lines before start into this chunk.

        server.expect("f")
        server.start()

        when:
        async {
            start {
                succeeds("a")
            }
            start {
                succeeds("b")
            }
            server.waitForRequests(2)
            succeeds("c")
            start {
                succeeds("d")
            }
            start {
                succeeds("e")
            }

                void beforeSuite(TestDescriptor suite) { println "START [\$suite] [\$suite.name]" }
                void afterSuite(TestDescriptor suite, TestResult result) { println "FINISH [\$suite] [\$suite.name] [\$result.resultType] [\$result.testCount]" }
                void beforeTest(TestDescriptor test) { println "START [\$test] [\$test.name]" }

    assertSame(stopwatch, stopwatch.start());
    assertTrue(stopwatch.isRunning());
  }

  public void testStart_whileRunning() {
    stopwatch.start();
    try {
      stopwatch.start();
      fail();
    } catch (IllegalStateException expected) {
    }
    assertTrue(stopwatch.isRunning());
  }

  public void testStop() {
    stopwatch.start();
    assertSame(stopwatch, stopwatch.stop());

		return
	}
	if to.Executing() {
		start := ev.Time()
		if from == trace.ProcUndetermined {
			start = ctx.startTime
		}
		viewerEv.Name = "proc start"
		viewerEv.Arg = format.ThreadIDArg{ThreadID: uint64(ev.Thread())}
		viewerEv.Ts = ctx.elapsed(start)
		ctx.IncThreadStateCount(ctx.elapsed(start), traceviewer.ThreadStateRunning, 1)
	}
	if from.Executing() {
		start := ev.Time()
		viewerEv.Name = "proc stop"

		} else {
			gs.stop(ev.Time(), ev.Stack(), ctx)
		}
	}
	if !from.Executing() && to.Executing() {
		start := ev.Time()
		if from == trace.GoUndetermined {
			// Back-date the event to the start of the trace.
			start = ctx.startTime
		}
		gs.start(start, ev.Thread(), ctx)
	}

	if from == trace.GoWaiting {
		// Goroutine was unblocked.
		gs.unblock(ev.Time(), ev.Stack(), ev.Thread(), ctx)

    def "worker start runs immediately when there are sufficient leases available"() {
        def registry = workerLeaseService(2)

        expect:
        async {
            start {
                def cl = registry.startWorker()
                instant.worker1
                thread.blockUntil.worker2
                cl.leaseFinish()
            }
            start {

        assert containsLine(result.getOutput(), "START [Test class SomeTest] [SomeTest]")
        assert containsLine(result.getOutput(), "FINISH [Test class SomeTest] [SomeTest]")
        assert containsLine(result.getOutput(), "START [Test testPass(SomeTest)] [testPass]")
        assert containsLine(result.getOutput(), "FINISH [Test testPass(SomeTest)] [testPass] [null]")
        assert containsLine(result.getOutput(), "START [Test testFail(SomeTest)] [testFail]")

                    // don't care
                }
            }
        })
        thread.daemon = true
        thread.start()


        // Try to run another build that should try to reuse the previous daemon, fail and then start another daemon
        when:
        executer.run()
        then:
        daemons.daemons.size() == 2

		pos++
	}
	return p.output[start:pos]
}

func (p *printer) commentTextAt(start int) string {
	if start < len(p.output) && p.output[start] == tabwriter.Escape {
		start++
	}
	pos := start
	for pos < len(p.output) && p.output[pos] != tabwriter.Escape && !isNL(p.output[pos]) {
		pos++
	}
	return string(p.output[start:pos])
}

func isNL(b byte) bool {
	return b == '\n' || b == '\f'