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Reply to Xcode 11 crashes when opening the project
Unfortunately none of the above solutions worked in my particular situation. So far the problem seems to be on just one project, XCode would immediately crash when I tried to open the project via any means. The last time it worked was with XCode before version 11.2.1. 11.2.1 has acted really funky trying to open other projects but no absolute XCode death. It looks like Roravec141's project was some sort of certificate error. The crash reports here would show a problem re-opening a tab - the error was in a method called "restoreSelectedTabsByIdentifierFromStateSaving". To fix this I did a show contents on the project.xcodeproj file and then deleted the xcuserdata folder and renamed project.xcworkspace to rrr_project.xcworkspace. Then did an "open" from XCode's file menu and it worked. This created a new xcuserdata folder and a new project.xcworkspace file. Hope this helps someone else that has this same problem.
Dec ’19