Moving whisper posts to a new topic creates a broken topic

[Stefan_Fairphone (Stefan Brand)]

Hey, I just created an empty topic without anything (no posts visible to normal users). Here are the steps to reproduce:

1. Whisper something.
2. Select the whispered posts (exclusively those) and move them to a new topic
3. End up with an empty topic without title, post nor anything else:

https://forum.fairphone.com/t/is-it-a-or-an-fp1-fp2-how-to-write-indefinite-articles-before-the-fairphone-abbreviation/37260

Here is a screenshot from a private Firefox window:

I’m sorry if someone has reported this before, a quick search did not lead me to anything.

PS.: The problem is that I can’t unwhisper the posts in that topic, even if I’m logged in as moderator.

Edit: Oh and this happened too (post count at -1):

I think I broke Discourse…

[dax (Daniela)]

Reproducible and confirmed bug.

Good catch @Stefan_Fairphone, I think no one has ever tried to create a topic with just whispers.

[sam (Sam Saffron)]

I don’t think we even support a whisper OP. so we should just ban people from moving whisper to new topic. Only allow people to move to existing.

[zogstrip (Régis Hanol)]

It’s now fixed
https://github.com/discourse/discourse/commit/5c1eaeca9e783aec07191958f0781ad9e57c0f22