Concurrency Symbol not found in iPadOS 15.0 beta 7

Question

Created Aug ’21

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Application runs fine in simulator but when running on an iPad I get the following error, first time I attempted to run on actual device. I have

Xcode 13 beta (Aug 10).
iOS 15.0 beta 7

Any ideas on how to work past this.


  Referenced from: /private/var/containers/Bundle/Application/99D0B06B-2339-43C0-8D78-3C62D1E0C2AB/rtmpCameraWolf.app/rtmpCameraWolf

  Expected in: /usr/lib/swift/libswift_Concurrency.dylib

Symbol not found: _$ss4TaskV8PriorityOMn

  Referenced from: /private/var/containers/Bundle/Application/99D0B06B-2339-43C0-8D78-3C62D1E0C2AB/rtmpCameraWolf.app/rtmpCameraWolf

  Expected in: /usr/lib/swift/libswift_Concurrency.dylib

(lldb)

dyld`__abort_with_payload:
    0x1015569ac <+0>:  mov    x16, #0x209
    0x1015569b0 <+4>:  svc    #0x80
->  0x1015569b4 <+8>:  b.lo   0x1015569d0               ; <+36>
    0x1015569b8 <+12>: stp    x29, x30, [sp, #-0x10]!
    0x1015569bc <+16>: mov    x29, sp
    0x1015569c0 <+20>: bl     0x10151d568               ; cerror_nocancel
    0x1015569c4 <+24>: mov    sp, x29
    0x1015569c8 <+28>: ldp    x29, x30, [sp], #0x10
    0x1015569cc <+32>: ret    
    0x1015569d0 <+36>: ret

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Answer 1

DTS Engineer OP

Apple

Aug ’21

Honestly, this sounds like a mismatch between the Swift concurrency runtime expected by Xcode 13.0b5 and the one actually implemented in iOS 15.0b7. Swift concurrency has been changing a lot, and so mismatches like this all too common )-:

Please try creating a tiny test project that use Swift concurrency. Does it reproduce the problem?

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