Xcode debugger doesn't print objects and shows nil, when they aren't

ios objective-c xcode debugging
Binarian picture Binarian · Nov 9, 2013 · Viewed 56.2k times · Source

Xcode shows an error when trying to print an object with po <objectName>, but only for one project.

Screenshot

error: Couldn't materialize struct: size of variable <varName> disagrees with the ValueObject's size Errored out in Execute, couldn't PrepareToExecuteJITExpression

The Xcode debugger also shows ALL objects as nil (self excluded), when they aren't (NSLog shows correct output, as seen in the image). I don't know what's wrong with the project. Every other project works fine.

Any idea what it could be? (Cleaning the project had no effect.)

Answer

Mick picture Mick · Nov 11, 2013

Are you sure you are not in "Release mode"?

If you want to see variable values you have to be in "Debug mode" (click on your project name on the top left corner near start/stop buttons, then "Edit scheme...", then "Run" settings, then "Info" tab, then "Build Configuration". Here set "Debug". If it was on "Release" that's the matter you saw all nils).

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