project prj "Project" "1.0" 2009-10-04 +6m

task T1 "T1" {
  end 2009-12-31
  duration 2w
}
# MARK: error 8 weak_end_dep
task T2 "T2" {
  precedes !T1
  start 2009-12-01
}
task T3 "T3" {
  precedes !T2
  duration 1w
}