ocaml-ci-scripts
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.travis-docgen.sh: line 21: KEEP: unbound variable
Travis fails with the error mentioned in the title: https://travis-ci.org/frenetic-lang/frenetic/builds/144830896
Any ideas what the problem may be?
/cc @simonjbeaumont
(I believe it's because we turn on set -u in one of the main script)