Bobby pointed me to https://searchfox.org/mozilla-central/source/extensions/spellcheck/hunspell/tests/unit

So just having a large enough N in the AF <N> field in the dictionary is enough to trigger this bug, but without a complete dictionary then we hit various issues (both leaks and frees of uninit memory) in hunspell, which I submitted a fix for in https://github.com/hunspell/hunspell/pull/756.

Bobby, I could add the whole Hungarian dictionary to the tree if you want (since it's under an MPL license), but otherwise the tests added in https://github.com/hunspell/hunspell/pull/756 should cover this case once we update hunspell and so on. Thoughts?

(In reply to Emilio Cobos Álvarez (:emilio) from comment #1)

So just having a large enough N in the AF <N> field in the dictionary is enough to trigger this bug, but without a complete dictionary then we hit various issues (both leaks and frees of uninit memory) in hunspell, which I submitted a fix for in https://github.com/hunspell/hunspell/pull/756.

Bobby, I could add the whole Hungarian dictionary to the tree if you want (since it's under an MPL license), but otherwise the tests added in https://github.com/hunspell/hunspell/pull/756 should cover this case once we update hunspell and so on. Thoughts?

That seems fine, adding the whole dictionary is probably overkill. Thanks!