triple flats/sharps?

[Marc Hohl]

Hello list,

yesterday I stubled upon a problem with chord transposition.

We had a jazz tune in c major with an a-flat:dim7 chord.

When transposing this tune to e-flat major, lilypond complains
about a missing triple flat and prints a c-flat minor 6/b5
instead (which is enharmonically correct, but ugly to read).

\score {
  \new ChordNames {
    \chordmode {
       as1:dim7
       \transpose c es as:dim7
    }
  }
}

Should we raise an issue for this on the tracker?

Regards,

Marc