While trying to edit a tag wiki excerpt, I encountered the page not found issue.

Here are the steps that I performed:

  1. Clicked on Tags
  2. Clicked on the name tab
  3. Clicked edit link under the tag . Refer screenshot #1.
  4. Encountered the Page not found error message. Refer screenshot #2.
  5. I thought that error must have to do with the period (dot) in the tag name. So, I tried to edit the tag and I didn't encounter any error message. Refer screenshot #3.
  6. When I clicked the tag , the browser URI looked as shown in screenshot #4. The id value is being passed as -1.
  7. When I clicked the tag , the browser URI looked as shown in screenshot #5.

It seems that the error happens to tags that don't have any questions. , are some of the tags that have the same issue. The error happens only while clicking the edit link on the page shown in screenshot #1. Even though tags page doesn't show any count against these tags, clicking on the tags leads to a page with full of questions but on closer inspection they seem to lead to a slightly altered version of the tag.

leads to tag ajax without a period (dot)

leads to tag avi without a period (dot)

leads to tag batch-file


#1: Steps to click tag wiki excerpt link


#2: Page not found error while editing tag .ajax

Page not found

#3: No error while editing tag .ajax

No error

#4: Edit uri for tag .ajax

tag .ajax

#5: Edit uri for tag .app

tag .app

  • I don't believe the problem is the links; the problem is that the tags showing up on that page are invalid, which are then generating the invalid links. If you go to stackoverflow.com/questions/tagged/.csv you get redirected to stackoverflow.com/questions/tagged/csv which is correct. Note that there is a tag wiki for [ajax], but it doesn't show up under [.ajax].
    – Jon Seigel
    Commented Aug 3, 2011 at 2:10
  • @Jon Seigel: Yes, as you said that the tags may be invalid. In that case, I believe those invalid tags shouldn't be displayed on that page. I have also pointed that out in my question that the tags with dot actually lead to tag without dot.
    – user162697
    Commented Aug 3, 2011 at 2:14
  • 2
    I really like how your bug reports include repro screenshots. Whatever development team you work on must really love-hate you. Commented Aug 3, 2011 at 10:00
  • @Cody What, no complaint that the arrows look suspiciously straight? Siva: the common factor is that those tags are synonyms; the edit link is wrong for synonyms (you can reproduce with e.g. shellscript which is a synonym of shell). Commented Aug 3, 2011 at 13:40
  • @Siva The comment to Cody was a semi-private joke, a reference to his comments that my circles aren't hand-drawn. I don't understand your comment about suggesting synonyms of ssis; what I'm saying is that the bug isn't related to the initial . but to the fact that the tags are synonyms. Commented Aug 3, 2011 at 14:47

1 Answer 1


I just fixed this particular bug.

I now remove the edit link from tag synonyms. This issue only happened when the /tags page shows a synonym and you try to edit it.

I think the way we handle tag synonyms in the /tags page needs some extra TLC, we should make it crystal clear you are dealing with a synonym, that way it teaches people what the right tag is. Also it should be consistent with the new tagger.


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