To reproduce do e.g.: $ hg help internals.foo This prints the wireprotocolv2 docs in mercurial 5.0 and on the default branch.
Fixed by https://mercurial-scm.org/repo/hg/rev/a84564b1a0b1 Nathan Goldbaum <nathan12343@gmail.com> help: check if a subtopic exists and raise an error if it doesn't (issue6145) Differential Revision: https://phab.mercurial-scm.org/D6441 (please test the fix)
Bug was set to TESTING for 7 days, resolving