Xcode macOS Archive fails with “Command SwiftCompile failed with a nonzero exit code”, but app runs fine

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Summary

The issue at hand is an Xcode archiving error for a macOS app, where the Command SwiftCompile fails with a nonzero exit code. This error occurs specifically when trying to archive the app, while it runs fine in debug mode. Despite attempts to clean the build folder, delete Derived Data, restart Xcode, and rebuild the project, the issue persists.

Root Cause

The root cause of this issue can be attributed to several factors, including:

  • Invalid or corrupted build settings
  • Incompatible Swift versions
  • Missing or incorrect architecture settings
  • Issues with the Release build configuration

Why This Happens in Real Systems

This issue can occur in real systems due to:

  • Changes in Xcode versions or updates
  • Modifications to the project structure or settings
  • Incompatibilities with third-party libraries or frameworks
  • Corrupted or outdated Derived Data

Real-World Impact

The real-world impact of this issue includes:

  • Delayed or failed app releases
  • Increased development time and costs
  • Frustration and decreased productivity for developers
  • Potential loss of revenue or user engagement

Example or Code (if necessary and relevant)

// Example of a potential fix: ensuring the correct Swift version is used
// In the Build Settings, set the Swift Compiler to the correct version
// This can be done by setting the SWIFT_COMPILER_VERSION flag

How Senior Engineers Fix It

Senior engineers can fix this issue by:

  • Verifying the Xcode version and updating if necessary
  • Checking the build settings and configurations for errors
  • Ensuring compatibility with third-party libraries and frameworks
  • Cleaning and rebuilding the project with a focus on the Release configuration
  • Using debugging tools to identify and resolve the specific issue

Why Juniors Miss It

Junior engineers may miss this issue due to:

  • Lack of experience with Xcode and Swift
  • Insufficient understanding of build settings and configurations
  • Inadequate troubleshooting and debugging skills
  • Failure to consider the differences between Debug and Release builds