Error in "Don't unroll the adjoint" paper?

Referring to the paper https://arxiv.org/pdf/1810.07951.pdf

I see this passage

image

which means it will run into an infinite loop as the end of block#2 goes back to black #2 with no way to exit.

I think it’s meant to say go back to block #1

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Author replied to me in email and that is wrong as pointed out. There is also a new version of the paper which corrected this mistake

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