I just tried accessing https://drupal.stackexchange.com/admin, and I got the following error:

System.NullReferenceException: Object reference not set to an instance of an object. at ASP._Page_Views_Shared_UserInfo_cshtml.<_PostDateDefault>b__1(TextWriter __razor_helper_writer) in c:\sites\stackexchange-network\Views\Shared\UserInfo.cshtml:line 49 at ASP._Page_Views_Shared_UserInfo_cshtml.b__2(TextWriter __razor_helper_writer) in c:\sites\stackexchange-network\Views\Shared\UserInfo.cshtml:line 95 at ASP._Page_Views_Shared_UserInfo_cshtml.Execute() in c:\sites\stackexchange-network\Views\Shared\UserInfo.cshtml:line 125 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy() at System.Web.Mvc.WebViewPage.ExecutePageHierarchy() at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) at StackOverflow.Controllers.StackOverflowController.RenderPartialRazorViewToString(Controller controller, String viewName, Object model) in c:\TeamCity\BuildAgent\work\af6c756150208ff6\StackOverflow\Controllers\ControllerBase.cs:line 919


Occurs on many other pages across the sites as well.

  • yes, i heard they got hacked Aug 29, 2012 at 17:28
  • 5
    Looks like this will get thrown anywhere that uses the UserInfo partial. I noticed it on "Responses" as well. Aug 29, 2012 at 17:37
  • 3
    @АртёмЦарионов - No, just a buggy build got deployed. Literally nothing but a missing if(Post != null), but an awfully important one. Aug 29, 2012 at 17:53
  • @KevinMontrose if I had to guess, I'd say this had to do with the logic on whether or not to display a user-action-time div. Am I right? Aug 29, 2012 at 18:04
  • @KevinMontrose or at least get the data for it Aug 29, 2012 at 18:05
  • @PhillipSchmidt - calculating the time delta for it, yeah. Aug 29, 2012 at 18:10
  • Lol, there are quite a lot of information about SO that is shown there.
    – nhahtdh
    Aug 29, 2012 at 18:17
  • @nhahtdh yeah, now everyone will know that SO has a view called UserInfo that has at least 125 lines. Quick, somebody rename it! Aug 29, 2012 at 18:20
  • @KevinMontrose what, do I not get a "debugger" badge or something? A job, maybe? :P Aug 29, 2012 at 18:23
  • @KevinMontrose that's exactly what i would say if i got hacked ;) Aug 29, 2012 at 19:16

1 Answer 1


Ugh, what a day.

Another bug in view conversion, this one touched a lot of pages (basically anywhere we show a user card without a single Post associated). A fix is rolling out.

  • 9
    Not trying to criticize, but there is always a better alternative to displaying a stack trace on an exception in a release environment. I'm very surprised to see this on a site as esteemed as SO. Aug 29, 2012 at 17:45
  • 1
    Though I guess due to the nature of the site, maybe it isn't such a bad thing. Aug 29, 2012 at 17:47
  • 5
    @Phillip - you're right, it's complete crap as it dodges all our error logging too. I'm checking in a fix for that with a vengeance. Aug 29, 2012 at 17:48
  • So, reports of being hacked are greatly exaggerated? Could someone put out a meta post (WE WERE NOT HACKED ON AUGUST 29th 2012)? Aug 29, 2012 at 17:51
  • 1
    @PeterTurner this doesn't in any way smell like the result of any kind of attack. What would it be, SQL injection? Couldn't be, since we see user cards elsewhere on the site. SO databases aren't going to have duplicate data, so if SQL injection were the case they'd be gone everywhere. Not that SO would be vulnerable to SQL injection in the first place. This is pretty clearly a logic error. Aug 29, 2012 at 17:57
  • Beat's me, I was just checking out meta, as I am wont to do after seeing weird errors, and saw "yeah, I heard they got hacked" after the wordpress fiasco, it would be good to know from the Devs. Some of us can't smell .NET as well as others :) Aug 29, 2012 at 18:02
  • 2
    On a programming Q&A I don't expect people to go: "Hallup!!! 1337 hackxorz!?!?! OMGWTFBBQ" when there is some error message somewhere... @PeterTurner
    – PeeHaa
    Aug 29, 2012 at 18:15
  • 1
    @PeeHaa well... umm Christianity is not a programming Q&A site. In any event, that was the first thing I saw when I came and looked here to report the bug. Aug 29, 2012 at 18:25
  • 1
    In that case it wasn't a hacker, but a higher being.
    – PeeHaa
    Aug 29, 2012 at 18:26
  • More fun with stack traces -- from the "top users in this tag" page.
    – Matt
    Aug 29, 2012 at 20:10

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