Xcode 16.3: exportArchive Copy failed when building and deploying

[jonmountjoy]

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• I confirm I have searched the Docs, Codemagic Sample Projects, and GitHub Discussions.
• I confirm the software versions on my local computer match the ones in CI environment (e.g. Xcode version, Gradle version). See here
• I confirm I am able to do a fresh clone of the repository and build the project on my local computer.

Which mobile framework are you using?

Flutter (Dart)

Steps to reproduce

My flutter app is built as usual, but distribution fails. Or rather, a step after the build fails, with

Encountered error while creating the IPA:
error: exportArchive Copy failed

Expected results

I see someone else had the problem recently, but their solution isn't really a solution (they downgraded from Xcode 16.3 to 16,2).
https://github.com/orgs/codemagic-ci-cd/discussions/3062

I can confirm that I toggled it to 16.3, and the problem occurred. When I change to 16.2, it goes away.

I suspect 16.3 changes something, like the location of a built file.

Actual results

Also note that the entire build system thinks it was successful because other artefacts were generated, but in fact, it did fail.

I think it's worth flagging this as 16.3 will soon become default, and then many more will hit this I suspect.

The build ID included is the one that failed.

Build id (optional)

67fed02f5def51c9eb1fac4d

[lucapanella-wacebo]

Same problem here... solved using 16.2.

[helinanever]

Thank you for reporting this, we are looking into it.

[Toasbi]

same, here another id: 67ff9f1198665a1a2592e86a

[knaeckeKami]

Workaround: running brew unlink rsync before the ios build fixes this

[helinanever]

We've rolled out an update to the build machines that should resolve the issue, so the suggested workaround should no longer be necessary.

Could someone please run another build using Xcode 16.3 to confirm that everything is working as expected now?