t.Errorf("goroutine summary for %d does not match task %d listing of %d", g.ID, id, goid)
				}
			}
		}

		// Marked as seen.
		delete(wantTasks, id)
	}
	if len(wantTasks) != 0 {
		t.Errorf("failed to find tasks: %#v", wantTasks)
	}
}

func assertContainsGoroutine(t *testing.T, summaries map[trace.GoID]*trace.GoroutineSummary, name string) {
	for _, summary := range summaries {