iOS app from TestFlight cannot be opened due to Code signing

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Created 1w

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One of our apps (built with Xcode 26.1.1 and distributed via TestFlight) crashes upon launch on iOS 17 with Exception Type: EXC_BAD_ACCESS (SIGKILL) and Termination Reason: CODESIGNING 2 Invalid Page.

I have never seen this before. Any pointers?

On iOS 18 & 26 this does not happen btw.

Answered by jzilske in 876059022

It does, and the exception reason tripped me up at first:

Exception Type:  EXC_BAD_ACCESS (SIGKILL)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Codes: 0x0000000000000001, 0x0000000000000000
VM Region Info: 0 is not in any region.  Bytes before following region: 4339253248
      REGION TYPE                 START - END      [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      __TEXT                   102a3c000-102a40000 [   16K] r-x/r-x SM=COW  /var/containers/Bundle/Application/5BD67EC6-39CC-428C-944B-C2E2FCA311B4/<private>.app/<private>
Termination Reason: CODESIGNING 2 Invalid Page

Turns put it was likely a problem with an async closure passed to a Combine subject as indicated by the first stack frames:

0   ???                           	0x0000000000000000 0x0 + 0
1   <private>                     	0x0000000102edacc8 type metadata accessor for (nonisolated(nonsending) (), ()) + 44 (/<compiler-generated>:0)
2   <private>                     	0x0000000102edac64 type metadata accessor for PassthroughSubject<(nonisolated(nonsending) (), ()), Never> + 44 (/<compiler-generated>:0)

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Answer 1

DTS Engineer OP

Apple

1w

Does this general a crash report? If so, please post an example here. See Posting a Crash Report for advice on how to do that.

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

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Answer 2

jzilske OP

1w

Recommended

It does, and the exception reason tripped me up at first:

Exception Type:  EXC_BAD_ACCESS (SIGKILL)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Codes: 0x0000000000000001, 0x0000000000000000
VM Region Info: 0 is not in any region.  Bytes before following region: 4339253248
      REGION TYPE                 START - END      [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      __TEXT                   102a3c000-102a40000 [   16K] r-x/r-x SM=COW  /var/containers/Bundle/Application/5BD67EC6-39CC-428C-944B-C2E2FCA311B4/<private>.app/<private>
Termination Reason: CODESIGNING 2 Invalid Page

Turns put it was likely a problem with an async closure passed to a Combine subject as indicated by the first stack frames:

0   ???                           	0x0000000000000000 0x0 + 0
1   <private>                     	0x0000000102edacc8 type metadata accessor for (nonisolated(nonsending) (), ()) + 44 (/<compiler-generated>:0)
2   <private>                     	0x0000000102edac64 type metadata accessor for PassthroughSubject<(nonisolated(nonsending) (), ()), Never> + 44 (/<compiler-generated>:0)

0

Answer 3

DTS Engineer OP

Apple

5d

the exception reason tripped me up at first:

Yeah, I’ve been mislead by that in the past. Fortunately, this time I remembered the mantra that we here in DTS chant steadily throughout the day:

Always start with a crash report.

Almost start with a crash report.

…

(-:

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

0