A dotimes whose every iteration continues still counts to its trip count. The
existing case fails by hanging if the latch is wrong; this one fails by
counting wrong, which is the off-by-one the four-block layout could have.
A restart-case clause was made a barrier on reasoning alone and nothing
observed it. Now something does.
And say what a labelled continue means, which is the half that is not obvious:
it advances the named loop's counter and skips the rest of its body, not just
the rest of the innermost one.
Joseph Ferano
3f097de522