Dear Sergio and fellow festival maintainers, Sorry for the delay - I only bisected this yesterday due to breaking of loading of some demo voices with an unhelpful error message.
I wish to revisit the solution for closing this bug. The solution changes the behaviour of (voice.list). In particular voices which do not contain proclaim_voice information fail to appear in the voice list. The current version of festival will list such voices. This would be less of a problem except for some of upstream's provided demo voices do not include this information. I didn't find this earlier since I do not use those demo voices but users often use them since they are explicitly provided by upstream. It should be noted that the last paragraph of Chapter 24 of the Festival manual (which we ship) discusses that (voice.list) should contain possible voices not just valid voices. Would it be possibly to alter this patch solution so although default voice is set from a valid list - BUT (voice.list) continues to contain possibly invalid and/or voices without proclaim_voice (such as upstream's provided demo voices). best regards, Peter