SIGTRAP crash in passkeys_darwin when authenticating with YubiKey hardware security key

[1mavic]

Hi!

The app crashes with a SIGTRAP signal immediately after entering the YubiKey PIN code during passkey authentication.
The crash originates in the passkeys_darwin native code when processing the response from AuthenticationServices framework.

Environment
iOS version: 26.2.1
Hardware authenticator: YubiKey (physical security key)
passkeys package version: 2.15.1
passkeys_darwin version: 0.2.0
Flutter version: 3.35.6+

Steps to Reproduce
Initiate passkey authentication flow that involves a hardware security key (YubiKey)
iOS presents the security key prompt
Insert/tap YubiKey and enter PIN code
App immediately crashes after PIN is accepted

Crash Log (from Sentry)
Signal: SIGTRAP
passkeys_darwin +0x00508c (In App)
passkeys_darwin +0x004050 (In App)
AuthenticationServices +0x02add0
libsystem_trace +0x00dbcc os_activity_apply_f
AuthenticationServices +0x02acf0
libdispatch +0x001adc
libdispatch +0x01b7fc
libdispatch +0x038b10
libdispatch +0x010ec8
libdispatch +0x010e04 _dispatch_main_queue_callback_4CF
CoreFoundation +0x06a2b4
CoreFoundation +0x01db3c
CoreFoundation +0x01ca6c
GraphicsServices +0x001498 GSEventRunModal
UIKitCore +0x09ddf8
UIKitCore +0x046e54 UIApplicationMain