> Hmm, state->next refers to two different pointer values on line 1 and line
> 2.  It may end up being set to NULL on line 1.  Am I missing something?

True, lnext(state->next) can set it to NULL.  I confused by the below
code on the same function doing the steps in reverse order.  With this
cleared, I have nothing else to say, so I am setting this to ready for

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