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NSData.FromArray crashing on iOS 14.8 device with segv after updating VS/XCode. Works on iOS 15 simulator.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(179.20000000000002, 53%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESD%3C/text%3E%3C/svg%3E)
Spencer Dube
6
Reputation points
As described in the title I'm getting a case of NSData.FromArray crashing on an iOS 14.8 device with segv after updating VS/XCode to versions 8.10.13 (build 11) and 13.1 respectively.
The error occurs with this information when run on an iphone 12 Pro Max running iOS 14.8:
=================================================================
Native Crash Reporting
=================================================================
Got a segv while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================
=================================================================
Native stacktrace:
=================================================================
0x100f32d48 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x100f28ec0 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x100f371c8 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x1eba7029c - /usr/lib/system/libsystem_platform.dylib : <redacted>
0x1a0f03d80 - /System/Library/Frameworks/Foundation.framework/Foundation : <redacted>
0x1a0f06798 - /System/Library/Frameworks/Foundation.framework/Foundation : <redacted>
0x1010e4438 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010e2b6c - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010d9a60 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010d7ff0 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x100f3a524 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100ff4d6c - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100ff85ac - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100ed3d00 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x100ed3b00 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x1ac3e9708 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac49bcb0 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac456a80 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac4569e8 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac753514 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac11729c - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac49655c - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac0f8a90 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1ac0f8384 - /System/Library/Frameworks/WebKit.framework/WebKit : <redacted>
0x1aa05c904 - /System/Library/Frameworks/JavaScriptCore.framework/JavaScriptCore : <redacted>
0x1aa05d8d4 - /System/Library/Frameworks/JavaScriptCore.framework/JavaScriptCore : <redacted>
0x19fc1507c - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
0x19fc14f78 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
0x19fc1427c - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
0x19fc0e25c - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : <redacted>
0x19fc0d9f4 - /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation : CFRunLoopRunSpecific
0x1b72de734 - /System/Library/PrivateFrameworks/GraphicsServices.framework/GraphicsServices : GSEventRunModal
0x1a268b75c - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : <redacted>
0x1a2690fcc - /System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore : UIApplicationMain
0x1010e4438 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010e2b6c - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010d9a60 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x1010d7ff0 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : _ZN16XamarinCallState3selEv
0x100f3a524 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100ff4d6c - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100ffb020 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : mono_pmip
0x100f18a20 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x1010d60bc - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : xamarin_GetFolderPath
0x100edfd28 - /private/var/containers/Bundle/Application/7E3C9F49-AC12-4629-A2D0-5C6FE60748B4/MyApp.app/MyApp : sqlite3_sourceid
0x19f8c9cf8 - /usr/lib/system/libdyld.dylib : <redacted>
=================================================================
Basic Fault Address Reporting
=================================================================
Memory around native instruction pointer (0x1eba70654):0x1eba70644 42 00 01 f1 e9 00 00 54 60 04 00 ac 63 80 00 91 B......T`...c...
0x1eba70654 20 04 40 ac 21 80 00 91 42 80 00 f1 68 ff ff 54 .@.!...B...h..T
0x1eba70664 21 00 02 8b 22 0c 40 ac 60 04 00 ac 63 00 02 8b !...".@.`...c...
0x1eba70674 62 0c 01 ac c0 03 5f d6 63 80 00 91 63 e8 7b 92 b....._.c...c.{.
=================================================================
Managed Stacktrace:
=================================================================
at <unknown> <0xffffffff>
at ObjCRuntime.Messaging:IntPtr_objc_msgSend_IntPtr_UIntPtr <0x00022>
at Foundation.NSData:FromBytes <0x00040>
at Foundation.NSData:FromArray <0x0007a>
at MyApp.WebInterpreterProtocol:StartLoading <0x000d8>
at MyApp.MyHandler:StartUrlSchemeTask <0x00028>
at <Module>:runtime_invoke_direct_void__this___WKWebView_IWKUrlSchemeTask <0x000be>
at <unknown> <0xffffffff>
at UIKit.UIApplication:UIApplicationMain <0x000b8>
at UIKit.UIApplication:Main <0x000b2>
at MyApp.application:Main <0x00012>
at <Module>:runtime_invoke_direct_void_string[] <0x00092>
=================================================================
When I run the exact same codebase and config on the simulator running iOS 15 there is no issue. The failure in question is when calling NSData.FromArray with a byte array representing a .css file or a .js file, but happens even if I provide a fresh byte array of a few arbitrary bytes. Did something change to NSData.FromArray that would cause it to fail on iOS 14.X but not in iOS 15 with the current versions of VS/XCode/.NET?
Here are the VS for Mac details on my install:
=== Visual Studio Community 2019 for Mac ===
Version 8.10.13 (build 11)
Installation UUID: 5997c116-773b-4abd-aee6-a0f7edea4d91
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638)
Package version: 612000140
=== Mono Framework MDK ===
Runtime:
Mono 6.12.0.140 (2020-02/51d876a041e) (64-bit)
Package version: 612000140
=== Roslyn (Language Service) ===
3.10.0-4.21269.26+029847714208ebe49668667c60ea5b0a294e0fcb
=== NuGet ===
Version: 5.9.0.7134
=== .NET Core SDK ===
SDK: /usr/local/share/dotnet/sdk/5.0.403/Sdks
SDK Versions:
5.0.403
5.0.103
5.0.102
3.1.415
3.1.406
3.1.405
3.1.402
3.1.302
3.1.200
3.1.101
3.1.100
3.0.101
3.0.100
2.1.701
MSBuild SDKs: /Applications/Visual Studio.app/Contents/Resources/lib/monodevelop/bin/MSBuild/Current/bin/Sdks
=== .NET Core Runtime ===
Runtime: /usr/local/share/dotnet/dotnet
Runtime Versions:
5.0.12
5.0.3
5.0.2
3.1.21
3.1.12
3.1.11
3.1.8
3.1.6
3.1.2
3.1.1
3.1.0
3.0.1
3.0.0
2.1.23
2.1.22
2.1.20
2.1.16
2.1.15
2.1.14
2.1.13
2.1.12
=== .NET Core 3.1 SDK ===
SDK: 3.1.415
=== Xamarin.Profiler ===
Version: 1.6.12.29
Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler
=== Updater ===
Version: 11
=== Xamarin Designer ===
Version: 16.11.0.39
Hash: cd672761d
Branch: remotes/origin/d16-11
Build date: 2021-10-06 20:09:18 UTC
=== Xamarin.Android ===
Not Installed
=== Eclipse Temurin JDK ===
Java SDK: Not Found
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL
=== Android SDK Manager ===
Version: 16.10.0.13
Hash: 1b81df5
Branch: remotes/origin/d16-10
Build date: 2021-09-28 20:47:12 UTC
=== Android Device Manager ===
Version: 16.10.0.15
Hash: 89dcc0b
Branch: remotes/origin/d16-10
Build date: 2021-09-28 20:47:30 UTC
=== Apple Developer Tools ===
Xcode 13.1 (19466)
Build 13A1030d
=== Xamarin.Mac ===
Version: 8.2.0.1 (Visual Studio Community)
Hash: 8fd9e6289
Branch: xcode13.1
Build date: 2021-10-26 10:13:55-0400
=== Xamarin.iOS ===
Version: 15.2.0.1 (Visual Studio Community)
Hash: 8fd9e6289
Branch: xcode13.1
Build date: 2021-10-26 10:13:56-0400
=== Build Information ===
Release ID: 810130011
Git revision: 53e3946a0f6b630a1124eb7ff26c1b545d040d32
Build date: 2021-11-04 11:20:46-04
Build branch: release-8.10
=== Operating System ===
Mac OS X 10.16.0
Darwin 21.1.0 Darwin Kernel Version 21.1.0
Wed Oct 13 17:33:23 PDT 2021
root:xnu-8019.41.5~1/RELEASE_X86_64 x86_64
Any assistance would be greatly appreciated!
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(22.400000000000002, 3%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWZ%3C/text%3E%3C/svg%3E)
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 25,996 Reputation points Microsoft Vendor2021-11-11T08:09:13.067+00:00 Do you try to create a new project to check if this issue still exist? There is a similar issue in github, you could follow the progress or report a new one.
-
dlchambers 1 Reputation point2022-01-21T18:49:09.037+00:00 @Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) I'm getting the same crash with this simple code:
byte[] data = new byte[] { 0x01 }; var n = NSData.FromArray(data);--- Details ---
iPhone 11, iOS 15.2
VisualStudio.17.Release/17.0.4+32014.148
Microsoft .NET Framework Version 4.8.04084C# Tools 4.0.1-1.21568.1+6ab6601178d9fba8c680b56934cd1742e0816bff
Mono Debugging for Visual Studio 17.0.11 (54f19d2)
Support for debugging Mono processes with Visual Studio.Xamarin 17.0.0.343 (d17-0@fb07a17)
Xamarin Designer 17.0.0.183 (remotes/origin/d17-0@a351f0f1f)
Xamarin Templates 17.0.17 (9e779b0)
Xamarin.Android SDK 12.1.0.5 (d17-0/6b0e6b2)
Xamarin.Android Reference Assemblies and MSBuild support.
Mono: c633fe9
Java.Interop: xamarin/java.interop/d17-0@febb1367
ProGuard: Guardsquare/proguard/v7.0.1@912d149
SQLite: xamarin/sqlite/3.36.0@a575761
Xamarin.Android Tools: xamarin/xamarin-android-tools/d17-0@a5194e9Xamarin.iOS and Xamarin.Mac SDK 15.4.0.0 (8fc41ae82)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.
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