I discovered at the weekend that I broke the canonical labelling of explicit hydrogens during a previous patch. That is - it throws a runtime exception (array out of bounds) for most graphs with explicit hydrogen representations. Quite surprised we didn't have any regressions show up.
The patch is very simple (essentially I forgot to copy an array back) - https://github.com/johnmay/cdk/compare/patch/canon-hyd-fix?expand=1
This could constitute a patch (22.214.171.124) release.
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