t/test_tree_copy.t, which is run as part of the test suite, prints an error:
$ perl -w t/test_tree_copy.t 1..7 ok 1 - modules loading ERROR: copy_tree: no tree_document_descriptor ok 2 # skip test perl not XS ok 3 - tree to texi and original match ok 4 - tree and copy to texi match ok 5 - tree after sectioning and copy to texi match ok 6 - manual tree and copy to texi match ok 7 - manual tree and copy to texi match However, the test suite still passes.
