In D10528#206617, @gregormi wrote:

Tried to use another branch to update an existing revision. Failed.

You can check with arc which what Arcanist will do before peforming the actual upload with arc diff.

Also, grep arc help diff for --update revision_id, which should've helped in your case.

In D10528#206878, @rkflx wrote:

In D10528#206617, @gregormi wrote:

Tried to use another branch to update an existing revision. Failed.

You can check with arc which what Arcanist will do before peforming the actual upload with arc diff.

Also, grep arc help diff for --update revision_id, which should've helped in your case.

Thanks. I'll try that next time. Meanwhile I added those hints here: https://community.kde.org/Infrastructure/Phabricator#Look_before_you_diff

In D10528#206918, @gregormi wrote:

Meanwhile I added those hints here: https://community.kde.org/Infrastructure/Phabricator#Look_before_you_diff

Thanks, that's the spirit!

"Please to that in a separate commit"
TODO: Is there a special arc command to do that or does it mean to manually post a separate patch to Phabricator?

Not time to figure out the exact commands ATM, but perhaps something with chunk-based interactive rebase, put it in the stash, update old revision, create new revision from stash. Or cherry-picking for separate commits. Or plain old copy-and-paste ;)