$ dub run harbored-mod -- .
[...]
Could not generate documentation for ./std/experimental/normint.d: Unable to parse Key/Value pairs: $(D_INLINECODE I) = $(D_INLINECODE (u)byte), $(D_INLINECODE (u)short), $(D_INLINECODE (u)int). $(D_INLINECODE (u)long) is not supported.