I don’t object to “void” but it would seem more helpful, in general, to surface the explicit error. Without actually designing the user experience, I’d say we will always want to be able to see both parts of the response. I’m wary of shuffling things around according to the state of the response, but a stronger signal that there is an error might be achieved by just showing a link to the relevant error type. For consistency, a no-error link or text might be shown for a successful evaluation.

for reference an example: https://www.wikifunctions.org/view/en/Z29694?call=%7B%22Z1K1%22%3A%22Z7%22%2C%22Z7K1%22%3A%22Z29694%22%2C%22Z29694K1%22%3A%7B%22Z1K1%22%3A%22Z7%22%2C%22Z7K1%22%3A%22Z6821%22%2C%22Z6821K1%22%3A%7B%22Z1K1%22%3A%22Z6091%22%2C%22Z6091K1%22%3A%22Q458%22%7D%7D%2C%22Z29694K2%22%3A%7B%22Z1K1%22%3A%22Z6092%22%2C%22Z6092K1%22%3A%22P37%22%7D%7D

Proposal:

Change #1272606 had a related patch set uploaded (by Daphne Smit; author: Daphne Smit):

[mediawiki/extensions/WikiLambda@master] FunctionEvaluator: Show error message when result is void (Z24)

https://gerrit.wikimedia.org/r/1272606

In T415695#11828848, @DSmit-WMF wrote:

Proposal:

@DSmit-WMF We can go with the inline error message with a little change to the copy to make it concise:

No result returned. Open ‘Details’ for more information.

Note: What do we want to do when we both return a value and also an error? (This is officially supported by the function model, but might not actually work right now; either way, we should have a plan.)

Do you have an example of such situation? @DSmit-WMF

Change #1272606 merged by jenkins-bot:

[mediawiki/extensions/WikiLambda@master] FunctionEvaluator: Show error message when result is void (Z24)

https://gerrit.wikimedia.org/r/1272606

@gonyeahialam This is more a question for @Jdforrester-WMF Who created the ticket. I think 'might not actually work right now' means there is no real world use case though. Not that I know of though

In T415695#11830793, @gonyeahialam wrote:

Note: What do we want to do when we both return a value and also an error? (This is officially supported by the function model, but might not actually work right now; either way, we should have a plan.)

Do you have an example of such situation? @DSmit-WMF

No current production examples that I know of, but someone could generate one if they wanted.

Im not sure the return value is z24 and the errors are in the metadata, This use case only works for returning a z24. Maybe if there are other uses cases we should handke that outside of this ticket?