lldb error: variable not available

Question

Here are my two lines of code:

NSString *frontFilePath = [[NSBundle mainBundle] pathForResource:[self.bookendFileNames objectAtIndex:self.randomIndex] ofType         


        

Answer 1

In Swift, possibly starting with Xcode 9 and still an issue in Xcode 10, this could even come up when code optimization is turned off in the build settings. As @carlos_ms has pointed out here, a temporary solution is to define the variable as mutable, i.e.

Turn

let foo = Bar().string

into

var foo = Bar().string

in order to cause optimization to skip on this variable. Note that this might not work in all instances.

In this case, a good ol' debugPrint() might help you out.