# multiplatform


03/06/2024, 1:37 PM
Has anyone run into a problem where a KMP app that used to run perfectly with on an iOS simulator XCode 14.x suddenly starts crashing when built with XCode 15? No code changes, same simulator. App crashes with EXC_BAD_ACCESS. Somewhere deep in the stack trace I see frames related to Kotlin GC. I don't even know where to begin debugging this.
It looks to me like the only change is the Base SDK that is used to build the app.