Is there any reason why XCode would fail to show the source code for a specific file while debugging? I have a breakpoint in the file which xcode hits correctly, but all I see is assembly. More annoyingly, this problem only shows up for one specific file (a regular .m file), but no other file. None of my co-workers have this problem, so it's local to my machine. I've cleaned the project, cleaned all untracked files from the folder, deleted xcode preferences, tried nearly everything in the book. Any explanations out there?