webview_flutter_wkwebview tests crash during -[WKNavigationResponse dealloc] on Xcode 26 beta 4 #173326
Description
Testing Xcode 26 beta 4 in this PR: flutter/packages#9748
Failure logs:
https://ci.chromium.org/ui/p/flutter/builders/try/Mac_arm64%20ios_platform_tests_shard_5%20master/23112/overview
Restarting after unexpected exit, crash, or test timeout; summary will include totals from previous launches.
Xcode xcresult failure from that run: https://storage.googleapis.com/flutter_logs/flutter/b50f795f-82df-417e-b550-b8d86b1ef0b0/boot%20simulator/b50f795f-82df-417e-b550-b8d86b1ef0b0/xcodebuild-2025-08-05T21:40:08.382079.zip
Tests crashing:
-[NavigationResponseProxyAPITests testIsForMainFrame]
-[NavigationResponseProxyAPITests testResponse]
-[NavigationDelegateProxyAPITests testDecidePolicyForNavigationResponse]
Crash log:
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x0000000101f3dd54
Termination Reason: SIGNAL 5 Trace/BPT trap: 5
Terminating Process: exc handler [33630]
Triggered by Thread: 0
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 CoreFoundation 0x101f3dd54 CFRetain.cold.1 + 16
1 CoreFoundation 0x101e14860 CFRetain + 104
2 WebKit 0x10864dd24 -[WKNavigationResponse dealloc] + 52
3 RunnerTests 0x158223a2c NavigationResponseProxyAPITests.testIsForMainFrame() + 784 (NavigationResponseProxyAPITests.swift:29)
4 RunnerTests 0x158223b9c @objc NavigationResponseProxyAPITests.testIsForMainFrame() + 44
I was able to reproduce this locally on Xcode 26.