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Hi all, We use Xcode 13.4.1 version, and on our apps latest version we got this error - Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Description: DYLD, Symbol not found: ___chkstk_darwin | Referenced from: /var/containers/Bundle/Application/F2825FAF-011D-47DC-950A-874E284724D1/MY-APP.app/MY-APP | Expected in: dyld shared cache | in /var/containers/Bundle/Application/F2825FAF-011D-47DC-950A-874E284724D1/MY-APP.app/MY-APP Triggered by Thread: 0 It's the same symbol ___chkstk_darwin but I can see that we have libswift_Concurrency.dylib in the stacktrace - 0x108790000 - 0x1087cffff libswift_Concurrency.dylib arm64 <8a821ebe157b3186b9c04ea6ec2c923e> /var/containers/Bundle/Application/F2825FAF-011D-47DC-950A-874E284724D1/MY-APP.app/Frameworks/libswift_Concurrency.dylib We had swift concurrency in our app on the previous versions almost a year, it started crashing only on our recent latest version. The problem is that it's not crashing when create an ad-hoc ipa, it's only crashing in live version, we also can't test the app on the testflight since testflight app is iOS 13+ now. Please help us resolve this issue, our app is crashing on all iOS 12 devices, thanks.