I’m developing an app targeting iOS 15.0 and macOS 13.0. When I run it using Xcode 15.0 (RC1 or stable) on macOS 13.5.2, it crashes on startup—except when running on iOS 17. This occurs both on physical devices and simulators.
Error Details
Console throws a dyld: Symbol not found
error, pointing at a SwiftUI symbol:
dyld: Symbol not found: _$ss5NeverO7SwiftUI10ShapeStyleACWP
It references paths for the iOS simulator and Mac shown below as examples:
Expected in: /Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 15.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUI.framework/SwiftUI
Expected in: [UUID omitted] /System/Library/Frameworks/SwiftUI.framework/Versions/A/SwiftUI
The complete stack trace is here.
Troubleshooting Steps
- Removed all Swift Package Manager dependencies to isolate the issue.
- The project runs successfully in Xcode 14.3.1.
Environment
- macOS: 13.5.2
- Xcode: 15.0 (also tried RC1)
- Command Line Tools: 15.0.0.0.1.1694021235
Minimal Reproducible Example
// When built with Xcode 15.0, conforming to ShapeStyle results in a startup crash.
enum CrashAppOnStart: ShapeStyle {
case iOS15Crashes
case iOS16Crashes
case macOS13Crashes
}
Profiling with the App Launch Instrument shows that execution stalls before hitting App.main(),
contributing to the crash.
Has anyone experienced a similar issue or found a solution?
2
Answers
You need to implemented
func resolve(in environment: EnvironmentValues) -> Self.Resolved
.New
resolve
function have been added since iOS17. DocumentationFound a solution
Implement
func resolve(in environment: EnvironmentValues) -> Self.Resolved
Updated example: