App crashes on launch with SIGABRT in dyld __abort_with_payload on iOS 27.0 Developer Beta

[achulzhanov]

An app using Lottie 4.6.1 crashes immediately on launch when running on a physical device with iOS 27.0 Developer Beta. The same build runs correctly on the iOS 26.5 simulator. The crash occurs before any app code executes, suggesting a dynamic linker failure (missing or changed symbol in the iOS 27 runtime).

Lottie 4.6.1 via SPM
iOS 27.0 Developer Beta crashes
iOS 26.5 simulator works
Xcode 27 beta
macOS 27.0 Developer Beta
iOS 26.0 minimum deployment target

The app crashes before any Swift code runs. The Xcode debugger shows:

• Signal: SIGABRT
• Crashed thread: Thread 1 - dyld __abort_with_payload
• Memory at the crash: 0KB (process never fully initialized)
• Visible call stack:

0  dyld  __abort_with_payload
...
6  dyld  start

Workaround: Removing Lottie from SPM dependencies entirely resolves the crash, which strongly suggests the crash originates from Lottie's framework loading. Wrapping usage in #available(iOS 27, *) does not help, since the crash occurs during dynamic linking before any Swift code runs.

This may be related to an API removed or renamed between iOS 26 and 27. I searched the existing issues and did not find any prior reports of this on iOS 27. Happy to provide more diagnostic information if there is a way to get the full symbolicated stack trace from a dyld-level crash on a beta device.

[calda]

Since iOS 27 is a very early beta at the moment, the best thing to do for a new iOS 27 regression would be to file a feedback with Apple.

[achulzhanov]

I found a workaround. Switching from the Lottie-Dynamic SPM product to the static Lottie product resolves the crash on iOS 27.0. The dyld __abort_with_payload crash appears to be specific to the dynamic framework variant.