Crashlytics - Kotlin-specific crash on iOS App in KMP Project

[Sztaba]

Description

Hey,

I have an issue with crashes caused by shared Kotlin code in Kotlin Multiplatform project. Stack trace is unreadable. Crashes caused by native Swift code are OK, they are readable and show line where the error occurred.
I've already tried using NSExcpetionKit or CrashKIOS and it doesn't work (probably outdated libs).

stacktrace.txt

Reproducing the issue

You need to integrate Firebase in KMP project and throw any exception in Kotlin code.

Firebase SDK Version

12.6.0

Xcode Version

16.4

Installation Method

Swift Package Manager

Firebase Product(s)

Crashlytics

Targeted Platforms

iOS

Relevant Log Output

If using Swift Package Manager, the project's Package.resolved

Expand Package.resolved snippet

{
  "originHash" : "2548ae020ffd717009314f4fcfe43a0632073da5312808cff790df97401a6cfc",
  "pins" : [
    {
      "identity" : "abseil-cpp-binary",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/abseil-cpp-binary.git",
      "state" : {
        "revision" : "bbe8b69694d7873315fd3a4ad41efe043e1c07c5",
        "version" : "1.2024072200.0"
      }
    },
    {
      "identity" : "app-check",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/app-check.git",
      "state" : {
        "revision" : "61b85103a1aeed8218f17c794687781505fbbef5",
        "version" : "11.2.0"
      }
    },
    {
      "identity" : "bugsnag-cocoa",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/bugsnag/bugsnag-cocoa.git",
      "state" : {
        "revision" : "f4348c29cc881ce80e4e22a46f29d7f5a18e924b",
        "version" : "6.34.1"
      }
    },
    {
      "identity" : "firebase-ios-sdk",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/firebase/firebase-ios-sdk",
      "state" : {
        "revision" : "087bb95235f676c1a37e928769a5b6645dcbd325",
        "version" : "12.6.0"
      }
    },
    {
      "identity" : "google-ads-on-device-conversion-ios-sdk",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/googleads/google-ads-on-device-conversion-ios-sdk",
      "state" : {
        "revision" : "35b601a60fbbea2de3ea461f604deaaa4d8bbd0c",
        "version" : "3.2.0"
      }
    },
    {
      "identity" : "googleappmeasurement",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/GoogleAppMeasurement.git",
      "state" : {
        "revision" : "c2d59acf17a8ba7ed80a763593c67c9c7c006ad1",
        "version" : "12.5.0"
      }
    },
    {
      "identity" : "googledatatransport",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/GoogleDataTransport.git",
      "state" : {
        "revision" : "617af071af9aa1d6a091d59a202910ac482128f9",
        "version" : "10.1.0"
      }
    },
    {
      "identity" : "googleutilities",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/GoogleUtilities.git",
      "state" : {
        "revision" : "60da361632d0de02786f709bdc0c4df340f7613e",
        "version" : "8.1.0"
      }
    },
    {
      "identity" : "grpc-binary",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/grpc-binary.git",
      "state" : {
        "revision" : "75b31c842f664a0f46a2e590a570e370249fd8f6",
        "version" : "1.69.1"
      }
    },
    {
      "identity" : "gtm-session-fetcher",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/gtm-session-fetcher.git",
      "state" : {
        "revision" : "fb7f2740b1570d2f7599c6bb9531bf4fad6974b7",
        "version" : "5.0.0"
      }
    },
    {
      "identity" : "interop-ios-for-google-sdks",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/interop-ios-for-google-sdks.git",
      "state" : {
        "revision" : "040d087ac2267d2ddd4cca36c757d1c6a05fdbfe",
        "version" : "101.0.0"
      }
    },
    {
      "identity" : "leveldb",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/firebase/leveldb.git",
      "state" : {
        "revision" : "a0bc79961d7be727d258d33d5a6b2f1023270ba1",
        "version" : "1.22.5"
      }
    },
    {
      "identity" : "nanopb",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/firebase/nanopb.git",
      "state" : {
        "revision" : "b7e1104502eca3a213b46303391ca4d3bc8ddec1",
        "version" : "2.30910.0"
      }
    },
    {
      "identity" : "nsexceptionkt",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/rickclephas/NSExceptionKt.git",
      "state" : {
        "branch" : "master",
        "revision" : "c0d458975e4f3babc67328011fc4724f0b6bae4b"
      }
    },
    {
      "identity" : "promises",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/google/promises.git",
      "state" : {
        "revision" : "540318ecedd63d883069ae7f1ed811a2df00b6ac",
        "version" : "2.4.0"
      }
    },
    {
      "identity" : "swift-protobuf",
      "kind" : "remoteSourceControl",
      "location" : "https://github.com/apple/swift-protobuf.git",
      "state" : {
        "revision" : "c169a5744230951031770e27e475ff6eefe51f9d",
        "version" : "1.33.3"
      }
    }
  ],
  "version" : 3
}

If using CocoaPods, the project's Podfile.lock

Expand Podfile.lock snippet

Replace this line with the contents of your Podfile.lock!

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[rizafran]

Hi @Sztaba, per checking your stack trace, the issue seems happening on the Kotlin side. Currently, KMP is not yet supported, and we might not be able to investigate unless it's reproduce in native Swift. That being said, you may try to raise this issue through this unofficial SDK.