Loop variable reaching integer `huge` causes infinite loop

[vmagnin]

Yes, going up to huge() in a loop can cause problems, depending on how the compiler manages the loop bounds. See this thread:

Loops don't behave like they should

I found a way to “break” do-loops. Consider this example, which approximates a loop from 1 to infinity: integer :: i do i=1, huge(i) ! ... The do-loop should calculate the iteration count, decrease it until it reaches zero and then exit the loop (11.1.7.4.5 j3). This shouldn’t be a problem, because the iteration count starts at huge(i) which is the largest possible integer of the given type. It is decreased until it reaches zero, so there cannot be any over- or underflow. However with gfort…