Xcode crashes on app launch

dyld: Symbol not found: _vfork  Referenced from: /Users/dani/Library/Developer/CoreSimulator/Devices/71E4AEC2-1486-40B2-AE9B-CE743E3D0A82/data/Containers/Bundle/Application/CF2583D6-6363-4B2C-ADA8-80A1E694B2B3/ColorFull.app/Frameworks/libclang_rt.tsan_iossim_dynamic.dylib  Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libSystem.B.dylib

dyld: launch, loading dependent libraries DYLD_SHARED_CACHE_DIR=/Users/dani/Library/Developer/CoreSimulator/Caches/dyld/21A5304g/com.apple.CoreSimulator.SimRuntime.iOS-14-5.18E182 DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot DYLD_LIBRARY_PATH=/Users/dani/Library/Developer/Xcode/DerivedData/ColorFull-cxygeqscqoehbndebjcqlvytvubm/Build/Products/Debug-iphonesimulator:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=@executable_path/Frameworks/libclang_rt.tsan_iossim_dynamic.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Applications/Xcode.app/Contents (lldb) 

For now, it seems like disabling Thread Sanitizer "fixes" this, but... Why..?

For now, it seems like disabling Thread Sanitizer "fixes" this

If you create a new test project from one of the built-in templates, does it have the same problem?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

how do I ensure I get an email next time someone replies to a post of mine here?

Do you have the “Receive emails when > There is a new reply to my question” checkbox set in your profile?

Share and Enjoy

Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

All boxes are checked

Hmmm, weird. I don’t relying on this myself, so I don’t have any personal experience to share, but this should work. If it’s not working for you, I recommend that you file a bug against DevForums.

Oh, wait, according to this thread other folks are seeing this and we already have a bug tracking it (FB9525818).

Share and Enjoy

Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Xcode crashes on app launch
 
 
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