Xcode debugger stopped displaying local and self variables

Question

I don't understand this at all, but I can no longer see any locals or ivars when debugging my iPhone app with Xcode 3.2.3. Everything seemed normal until yesterday afternoon, and now I just see the globals and registers, which are not of much interest to me.

HAs anyone else had this experience? I feel like I have gone crazy. How can the debugger "forget" to show me variables? Its the debug build, non-optimized code generation, breakpoints work, where are the variables?

I am so sorry I upgraded to Xcode 3.2.3. What a mistake that was. I am so not impressed.

Oh, yeah, I built a template app just to see if THAT one would debug normally and it does, so I am looking at the differences in the project settings to see if that holds a clue.

Answer 1

In my cases it was the optimisation for debug.

In the build settings Optimization Level was set to Fastest for both Debug and Release. I switched Debug to None and it solved the issue.

Answer 2

Close the project, open Terminal, cd into the <project>.xcodeproj directory, delete all <username>.* files (i.e. delete everything except project.pbxproj), then try opening your project again.

(Note: don't worry about the files you are deleting - they are just per-user setting files for things like window positions, saved breakpoints, etc - the important stuff is all in project.pbxproj.)

One other thing that has also solved problems for me in the past is to trash the entire build folder.