Created attachment 447995 [details] crash logs When hovering over images (among other things - it seems that anything that interacts with alt-text is affected), the WebView thread crashes completely. This bug has been reported on two Rust WebView binding repos: - https://github.com/Boscop/web-view/issues/308 - https://github.com/tauri-apps/tauri/issues/2934 This is a pretty major blocker - I really can't ship any Webview app on macOS 12 / M1 . The main crash thread looks like this: ``` 2021-12-26 21:15:27.547 hello_file[50054:630185] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[15]' *** First throw call stack: ( 0 CoreFoundation 0x000000018e0c81cc __exceptionPreprocess + 240 1 libobjc.A.dylib 0x000000018de197b8 objc_exception_throw + 60 2 CoreFoundation 0x000000018e198488 -[__NSCFString characterAtIndex:].cold.1 + 0 3 CoreFoundation 0x000000018e1a50c4 -[__NSPlaceholderDictionary initWithCapacity:].cold.1 + 0 4 CoreFoundation 0x000000018dfcfed0 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 320 5 CoreFoundation 0x000000018dfcfd64 +[NSDictionary dictionaryWithObjects:forKeys:count:] + 60 6 VisionKitCore 0x0000000204ca7e08 -[VKAnalyticsAnalyzerEvent coreAnalyticsDictionary] + 1208 7 VisionKitCore 0x0000000204c6ab00 -[VKAnalyticsProcessor processAndSendEvent:] + 92 8 VisionKitCore 0x0000000204c607d8 __69-[VKImageAnalyzer _processRequest:progressHandler:completionHandler:]_block_invoke_2 + 1200 9 libdispatch.dylib 0x000000018ddbce60 _dispatch_call_block_and_release + 32 10 libdispatch.dylib 0x000000018ddbebac _dispatch_client_callout + 20 11 libdispatch.dylib 0x000000018ddc6330 _dispatch_lane_serial_drain + 672 12 libdispatch.dylib 0x000000018ddc6ea4 _dispatch_lane_invoke + 392 13 libdispatch.dylib 0x000000018ddd1708 _dispatch_workloop_worker_thread + 656 14 libsystem_pthread.dylib 0x000000018df79304 _pthread_wqthread + 288 15 libsystem_pthread.dylib 0x000000018df78018 start_wqthread + 8 ) libc++abi: terminating with uncaught exception of type NSException [1] 50054 abort cargo run --example hello_file ``` However, digging in a bit deeper, I can expose more information through the console. ```rust 2021-12-08 13:55:26.898938-0500 hello_file[56305:1092535] [General] An uncaught exception was raised 2021-12-08 13:55:26.898958-0500 hello_file[56305:1092535] [General] *** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[15] 2021-12-08 13:55:26.898978-0500 hello_file[56305:1092535] [General] ( 0 CoreFoundation 0x00000001b81ac12c __exceptionPreprocess + 240 1 libobjc.A.dylib 0x00000001b7efd808 objc_exception_throw + 60 2 CoreFoundation 0x00000001b827c464 -[__NSCFString characterAtIndex:].cold.1 + 0 3 CoreFoundation 0x00000001b82890a0 -[__NSPlaceholderDictionary initWithCapacity:].cold.1 + 0 4 CoreFoundation 0x00000001b80b3e30 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 320 new webview inner Wry has started! 2021-12-08 13:57:24.929118-0500 hello_file[56488:1095248] [General] An uncaught exception was raised 2021-12-08 13:57:24.929142-0500 hello_file[56488:1095248] [General] *** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[15] 2021-12-08 13:57:24.929169-0500 hello_file[56488:1095248] [General] ( 0 CoreFoundation 0x00000001b81ac12c __exceptionPreprocess + 240 1 libobjc.A.dylib 0x00000001b7efd808 objc_exception_throw + 60 2 CoreFoundation 0x00000001b827c464 -[__NSCFString characterAtIndex:].cold.1 + 0 3 CoreFoundation 0x00000001b82890a0 -[__NSPlaceholderDictionary initWithCapacity:].cold.1 + 0 4 CoreFoundation 0x00000001b80b3e30 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 320 5 CoreFoundation 0x00000001b80b3cc4 +[NSDictionary dictionaryWithObjects:forKeys:count:] + 60 6 VisionKitCore 0x000000022e55cd4c -[VKAnalyticsAnalyzerEvent coreAnalyticsDictionary] + 1208 7 VisionKitCore 0x000000022e51fb1c -[VKAnalyticsProcessor processAndSendEvent:] + 92 8 VisionKitCore 0x000000022e5157f4 __69-[VKImageAnalyzer _processRequest:progressHandler:completionHandler:]_block_invoke_2 + 1200 9 libdispatch.dylib 0x00000001b7ea0e60 _dispatch_call_block_and_release + 32 10 libdispatch.dylib 0x00000001b7ea2bac _dispatch_client_callout + 20 11 libdispatch.dylib 0x00000001b7eaa330 _dispatch_lane_serial_drain + 672 12 libdispatch.dylib 0x00000001b7eaaea4 _dispatch_lane_invoke + 392 13 libdispatch.dylib 0x00000001b7eb5708 _dispatch_workloop_worker_thread + 656 14 libsystem_pthread.dylib 0x00000001b805d5b0 _pthread_wqthread + 288 15 libsystem_pthread.dylib 0x00000001b805c2c4 start_wqthread + 8 ```
<rdar://problem/86991372>
hello, i have a same problem here: https://github.com/webview/webview/issues/627
The underlying cause of this bug was outside of WebKit, so we cannot show a fix revision. This is fixed at that level, and you should be able to confirm the fix in an upcoming macOS 12.3 beta.
Note: Using 'Moved' to indicate it was fixed in a non-WebKit part of macOS/iOS.