(V29.5) Boot-up crash in iOS System Using Unreal 5 Project.

[LocketGoma]

• Version : V3.29.5

• Lang/Envioments : C++ / Unreal 5.3.2 / iOS 18 or later

• Steps

1. Build Unreal App from ".xcarchive"
2. .ipa from 1's ".xcarchive"
3. install app using Apple Configuator
4. Start App, Crash occur while App Boot-up
5. Get Crash Report in "Open Recent Logs"

---

• Crash Logs
  likely :

6    MyApp                               0x105655c0c FMemory::Free(void*) + 8248332 (FMemory.inl:141)

7    MyApp                                0x1053fd0fc google::protobuf::EncodedDescriptorDatabase::DescriptorIndex::AddSymbol+ 5787900 (std::__1::basic_string_view<char, std::__1::char_traits<char>>) + 1876

8    MyApp                                0x1053fbf78 bool google::protobuf::EncodedDescriptorDatabase::DescriptorIndex::AddFile<google::protobuf::FileDescriptorProto>+ 5783416 (google::protobuf::FileDescriptorProto const&, std::__1::pair<void const*, int>) + 1080

9    MyApp                                0x1053fbaa0 google::protobuf::EncodedDescriptorDatabase::Add+ 5782176 (void const*, int) + 84

10   MyApp                                0x1053ae4e0 google::protobuf::DescriptorPool::InternalAddGeneratedFile+ 5465312 (void const*, int) + 88

11   MyApp                                0x105422618 google::protobuf::internal::AddDescriptors+ 5940760 (google::protobuf::internal::DescriptorTable const*) + 140

12 dyld                                    0x1c82a4f0c invocation function for block in dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const + 627

That Crash is triggered immediately while Start App.

I Found Some Crash Point :

1. Some .pb.cc files (from .proto files)
2. Trying "AddSymbol" / "AddDescriptors" (in "generated_message_reflection")
3. If blocking "AppDescriptions" Func, Chash has gone. (but Protobuffer System is also blocked)

so. What can i do next step?
I can not upgrade Protobuffer version & UE Engine version (because My Project's Settings)
(but. i can combination in new version if that issue is solved after Some newer version from my version)

[LocketGoma]

Also, Other OS are not trggered Crash. (especially linux / Andriod System), and Xcode Debug Envioment. (using .app file)

It Just *.ipa (for Distrubution app...)

[esrauchg]

The error is indicative of some mistake in the application layer with dynamic linking; you have to be extremely careful when using dynamic linking in C++Proto as clang may optimize each units separately and make things that are incompatible.

If you have some more info we might be able to advise, but basically the main answer is that this is almost definitely no issue in Protobuf but some problem in how the dynamic linking is set up in the application layer.