furrykef wrote:

I notice a similar problem when editing the same page using multiple tabs. If you edit individual sections, the behavior is correct -- edits are merged properly if the sections don't overlap, and they yield a conflict if they do -- but if instead the two tabs are editing the entire page rather than individual sections, the second edit will silently undo the first.

onionleather wrote:

Had the same problem today. Curiously on the edit conflict page. I was saving my edit on the conflict page and had overwritten a comment from another user, which he had written meanwhile.

See also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=4745#c12

orlady wrote:

This has cropped up again since the new version of MediaWiki was installed. At
http://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Edit_conflicts_not_being_detected I have described two occurrences in two days of unflagged edit conflicts. In both instances in which edit conflicts were not registered, one user was editing a page section and the other user was editing the entire page.

• Bug 22992 has been marked as a duplicate of this bug. ***

I am restoring the priority of this to normal. A bug that destroys the edits of others, potentially driving away new editors, cannot possibly be low priority. According to the definitions, that means just sitting around until someone is kind enough to offer a patch. IMHO, it should be an even higher priority.

As long as nobody investigates and manages to track down criteria or situation to reproduce, it will de facto be low priority, no matter what it should be. :-/

Do you need more examples of the error? What else can people do from the user side to help?

(In reply to Spinningspark from comment #7)

Do you need more examples of the error? What else can people do from the
user side to help?

Adam (CC'ed): You worked on bug 56849 (edit conflict detection) a while ago; maybe you could provide some input if there's anything / way users can help here?

In T13922#161181, @bzimport wrote:

furrykef wrote:

I notice a similar problem when editing the same page using multiple tabs. If you edit individual sections, the behavior is correct -- edits are merged properly if the sections don't overlap, and they yield a conflict if they do -- but if instead the two tabs are editing the entire page rather than individual sections, the second edit will silently undo the first.

This is a "feature": self-conflicts are ignored. See T175745: Do not overwrite edits when conflicting with self.