In my project, the automatic variables in the watch/expressions window (self, etc.) display their values fine, but any expression I add myself just shows "Invalid expression." Even if I put something basic in like "true", 1, or an exact variable that was auto-added, it will only show Invalid expression. This is in Xcode 7.2. Is this a bug and what can I do to troubleshoot? The only result I found Googling mentioned Crashlytics being an issue but I don't have that installed. Thanks.
Watch window always showing "Invalid expression"
Make sure your building for "Debug" and not "Release"