project "Test" 2010-07-12 +1m

task t1 "T1" {
  duration 1w
  end 2010-07-26
}
# MARK: error 8 task_succ_after
task t2 "T2" {
  precedes !t1 { gaplength 3d }
  duration 6d
  start ${projectstart}
}