On Windows only, a program with no reactions runs forever. Below is an example such program:
target C
reactor R1 {
logical action a1
logical action a2
}
reactor R2 {
r1 = new[3] R1()
logical action a1
logical action a2
}
reactor R3 {
r2 = new[4] R2()
logical action a1
logical action a2
}
main reactor {
r = new[2] R3()
logical action a1
logical action a2
}