Evaluation failure at ocamlgraph:

[camlspotter]

...
Eval "{ocamlgraph}.Graph.Mincut" done!
Eval "{ocamlgraph}.Graph" done!
WARNING: Impos mexp:
           "{ocamlgraph}.Graph.Blocks.ConcreteVertex(F \"{ocamlgraph}.Graph.Blocks\" 3280)(V \"{ocamlgraph}.Graph.Blocks\" 3281).HM"
           EApply
             (ECoerce
                (EVar (KModule, "F \"{ocamlgraph}.Graph.Blocks\" 3280"),
...

[camlspotter]

And finally it fails:

Fatal error: exception File "humpflat.ml", line 33, characters 8-14: Assertion failed
Raised at file "humpflat.ml", line 93, characters 4-11
Called from file "humpflat.ml", line 146, characters 39-53
Called from file "list.ml", line 70, characters 22-25
Called from file "xlist.ml" (inlined), line 151, characters 21-32
Called from file "humpflat.ml", line 146, characters 11-57
Called from file "scrape.ml", line 78, characters 38-81
Called from file "base.ml" (inlined), line 21, characters 28-33
Called from file "scrape.ml", line 90, characters 7-34
Called from file "list.ml", line 77, characters 12-15
Called from file "main.ml", line 257, characters 20-24