Fiddler does not launch on Win 8.1

[Jürgen]

On my Windows 8.1 Fiddler 4 (most recent version) only shows the splash screen and onle occasionally the warning dialog about Windows 8 when launching. After that it just crashes without any error message. I did not find any information about that in the event log.

How could I find out what the cause could be?

[Jürgen]

Found the reason: I have Password Safe 7 installed. Fiddler just starts fine if Password Safe is not running but crashes if Password Safe is running. Still don't know what the real cause is (could I somehow solve this issue?).

[Eric Lawrence]

Hi, Jurgen--

I'd talk to the folks behind "Password Safe 7" to determine where their bug lies. Unfortunately, there appear to be many different products called "Password Safe" so I can't try it out myself.

Regards,
Eric Lawrence
Telerik

 

 

[Jürgen]

Thanks for the reply, Eric. It's this Password Safe: http://www.passwordsafe.de/en/products/private-user/standard-edition.html.

[Eric Lawrence]

Hi, Jurgen--

That product contains the following very questionable code:

   while (true)
   {
     foreach (window in System) {
         if (window.title == "Fiddler HTTP Debugger") Process.Kill(window.owner);
     }
   }

You may wish to consider whether a product so careless is something you want to use.

Regards,
Eric Lawrence
Telerik

 

 

[Jürgen]

Thanks, Erik.

That code ist just unbelievable (I am a programmer myself). I will contact them about that.

[Jürgen]

By the way: How did you decompile the code?

[Eric Lawrence]

That's just pseudo-code. If you try to use notepad to save a file with the word "Debugger" in the title, you'll see that they kill notepad.

I've filed a support ticket in their system, but it's not clear that they'll respond to it.

Regards,
Eric Lawrence
Telerik

 

 

[Jürgen]

Thanks for the update, Eric. Tried the Notepad test myself. Unbelievable. I sent them a quite angry e-mail about that.