.NET MAUI RC 2 app using SaxonCS NuGet library runs fine on Windows but crashes with "[libc] Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR)" on Android

[martin-honnen]

Description

I have so far failed to use the SaxonCS library https://www.nuget.org/packages/SaxonCS/ cross platform with MAUI, any attempt to use the XPath 3.1, XQuery 3.1 or XSLT 3.0 functionality it provides works fine with MAUI under Windows but under Android crashes with "[libc] Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR)".

The attached sample project works fine as far as using the library and creating its central Processor object and reading out its ProductTitle property, even under Android. But any attempt to use the XPath 3.1 features (in that sample project simply to call an XPath 3.1 function current-dateTime() triggered by clicking a button) works fine under Windows but crashes in VS 2022 Preview under an Android 11 - Api 30 emulator like pixel 5 with an error [libc] Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x10 in tid 21830 (c2testsingleton), pid 21830 (c2testsingleton) in the output window.

Note that SaxonCS, to be used beyond the simple creating and the Processor and reading out its properties like ProductTitle, requires a license (like an evaluation license), so unfortunately to reproduce the issue you need to request an evaluation license and add the license file to the attached project.

SaxonCS113MauiRC2TestSingleton.zip

Steps to Reproduce

1. Download the attached VS 2022 solution and open it with VS 2022 preview with MAUI RC 2 workload installed.
2. The solution as downloaded should build and run under Windows and Android as far as loading the SaxonCS.dll and creating its central Processor object and displaying its ProductTitle property via databinding in a Label is concerned.
3. One caveat: as SaxonCS is commercial software, using more than mentioned above requires a license in a form of a saxon-license.lic file; you can request an evaluation license from Saxonica at https://www.saxonica.com/download/download.xml. So you need to request such a license and once received, add that file saxon-license.lic to the project, with the build action as a MAUI asset.
4. With the license file added as a MAUI asset to the project you can now build and run under Windows to check that clicking the button works fine to display the result of calling the XPath 3.1 function current-dateTime() while under Android it crashes with the final line of the output Window showing an error like [libc] Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x10 in tid 21830 (c2testsingleton), pid 21830 (c2testsingleton).

Version with bug

Release Candidate 2 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 11

Did you find any workaround?

No.

Relevant log output

> am start -a "android.intent.action.MAIN" -c "android.intent.category.LAUNCHER" -n "com.companyname.saxoncs113mauirc2testsingleton/crc64d9c7f96747fc337d.MainActivity"
> Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.companyname.saxoncs113mauirc2testsingleton/crc64d9c7f96747fc337d.MainActivity }
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/SaxonCS113MauiRC2TestSingleton.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Mono.Android.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Java.Interop.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Collections.dll [External]
Resolved pending breakpoint for 'Android.Runtime.JNIEnv.RegisterJniNatives(System.IntPtr, System.Int32, System.IntPtr, System.IntPtr, System.Int32)' to /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNIEnv.cs:124 [0x00000].
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Threading.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.InteropServices.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Threading.Thread.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Diagnostics.StackTrace.dll [External]
Loaded assembly: data-0x7d1b9c44f010 [External]
Loaded assembly: data-0x7d1b9c4af070 [External]
Loaded assembly: data-0x7d199239a040 [External]
Loaded assembly: data-0x7d1b9c48f050 [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/netstandard.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Linq.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Collections.Concurrent.dll [External]
Resolved pending breakpoint for 'Xamarin.HotReload.HotReloadAgent.BreakpointSendToIde(System.String)' to D:\a\_work\1\s\HotReload\Source\Xamarin.HotReload.Agent\HotReloadAgent.cs:419 [0x00000].
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Text.Json.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Text.Encodings.Web.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.ComponentModel.dll [External]
[c2testsingleto] Late-enabling -Xcheck:jni
[c2testsingleto] Unquickening 12 vdex files!
[c2testsingleto] Unexpected CPU variant for X86 using defaults: x86_64
[c2testsingleto] The ClassLoaderContext is a special shared library.
[NetworkSecurityConfig] No Network Security Config specified, using platform default
[NetworkSecurityConfig] No Network Security Config specified, using platform default
[debug-app-helper] Checking if libmonodroid was unpacked to /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64/libmonodroid.so
[debug-app-helper] Native libs extracted to /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64, assuming application/android:extractNativeLibs == true
[debug-app-helper] Setting up for DSO lookup in app data directories
[debug-app-helper] Added filesystem DSO lookup location: /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64
[debug-app-helper] Using runtime path: /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64
[debug-app-helper] checking directory: `/data/user/0/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/lib`
[debug-app-helper] directory does not exist: `/data/user/0/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/lib`
[debug-app-helper] Checking whether Mono runtime exists at: /data/user/0/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/libmonosgen-2.0.so
[debug-app-helper] Checking whether Mono runtime exists at: /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64/libmonosgen-2.0.so
[debug-app-helper] Mono runtime found at: /data/app/~~F8nMIH40SGpZLXpcGcY98Q==/com.companyname.saxoncs113mauirc2testsingleton-JMQvWUZFhWv2ZKN16UVFDg==/lib/x86_64/libmonosgen-2.0.so
[c2testsingleto] Attempt to remove non-JNI local reference, dumping thread
[DOTNET] JNI_OnLoad: JNI_OnLoad in pal_jni.c
[monodroid] Creating public update directory: `/data/user/0/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__`
[c2testsingleto] Attempt to remove non-JNI local reference, dumping thread
[monodroid-debug] Trying to initialize the debugger with options: --debugger-agent=transport=dt_socket,loglevel=0,address=10.0.2.2:55666,embedding=1
[monodroid-assembly] open_from_bundles: failed to load assembly SaxonCS113MauiRC2TestSingleton.dll
[monodroid-gc] GREF GC Threshold: 46080
[monodroid-assembly] open_from_bundles: failed to load assembly Mono.Android.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Java.Interop.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Collections.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Threading.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.InteropServices.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Threading.Thread.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Diagnostics.StackTrace.dll
[c2testsingleto] Attempt to remove non-JNI local reference, dumping thread
[monodroid-assembly] open_from_bundles: failed to load assembly netstandard.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Linq.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.VisualStudio.DesignTools.TapContract.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.VisualStudio.DesignTools.TapContract.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.HotReload.Contracts.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.HotReload.Contracts.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Collections.Concurrent.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Text.Json.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Text.Encodings.Web.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.ComponentModel.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.Controls.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.HotReload.Contracts.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.Controls.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.HotReload.Contracts.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.VisualStudio.DesignTools.TapContract.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.VisualStudio.DesignTools.TapContract.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.ObjectModel.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.ObjectModel.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.Graphics.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.Essentials.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Logging.Abstractions.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.Graphics.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.Essentials.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Logging.Abstractions.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Loader.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Loader.dll [External]
Resolved pending breakpoint for 'Xamarin.HotReload.HotReloadAgent.BreakpointCheckpoint()' to D:\a\_work\1\s\HotReload\Source\Xamarin.HotReload.Agent\HotReloadAgent.cs:414 [0x00000].
[monodroid-assembly] open_from_bundles: failed to load assembly System.Memory.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Memory.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Reflection.Emit.Lightweight.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Reflection.Emit.ILGeneration.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Reflection.Primitives.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Reflection.Emit.Lightweight.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Reflection.Emit.ILGeneration.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Reflection.Primitives.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.CompilerServices.Unsafe.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.CompilerServices.Unsafe.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Core.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Core.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.DependencyInjection.Abstractions.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.DependencyInjection.Abstractions.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.Controls.Xaml.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Configuration.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Configuration.Abstractions.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Logging.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.Controls.Xaml.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Configuration.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Configuration.Abstractions.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Logging.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.AppCompat.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.Google.Android.Material.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.AppCompat.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.Google.Android.Material.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.ComponentModel.TypeConverter.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.ComponentModel.TypeConverter.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Private.Uri.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Private.Uri.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Fragment.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Activity.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Lifecycle.ViewModel.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Lifecycle.Common.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.SavedState.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Fragment.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Activity.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Lifecycle.ViewModel.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Lifecycle.Common.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.SavedState.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.DrawerLayout.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.CustomView.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Navigation.Runtime.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.DrawerLayout.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.CustomView.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Navigation.Runtime.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.DependencyInjection.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.DependencyInjection.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Diagnostics.Tracing.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Diagnostics.Tracing.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Xml.ReaderWriter.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Private.Xml.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Xml.ReaderWriter.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Private.Xml.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Text.Encoding.Extensions.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Text.Encoding.Extensions.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Text.RegularExpressions.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Text.RegularExpressions.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Numerics.Vectors.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Numerics.Vectors.dll [External]
[c2testsingleto] Explicit concurrent copying GC freed 521(77KB) AllocSpace objects, 0(0B) LOS objects, 24% free, 1810KB/2413KB, paused 357us total 24.145ms
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.RecyclerView.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.SwipeRefreshLayout.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.CardView.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.RecyclerView.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.SwipeRefreshLayout.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.CardView.dll [External]
[libEGL] loaded /vendor/lib64/egl/libEGL_emulation.so
[libEGL] loaded /vendor/lib64/egl/libGLESv1_CM_emulation.so
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Loader.dll
[libEGL] loaded /vendor/lib64/egl/libGLESv2_emulation.so
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Loader.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Maui.Controls.Compatibility.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Maui.Controls.Compatibility.dll [External]
Thread started:  #2
Thread started:  #3
Thread started:  #4
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Serialization.Json.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Private.DataContractSerialization.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Serialization.Xml.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Serialization.Json.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Private.DataContractSerialization.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Serialization.Xml.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Serialization.Primitives.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Serialization.Primitives.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.CoordinatorLayout.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.CoordinatorLayout.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Lifecycle.LiveData.Core.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Lifecycle.LiveData.Core.dll [External]
[c2testsingleto] Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed)
[c2testsingleto] Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed)
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.ViewPager2.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.ViewPager2.dll [External]
[TabLayout] MODE_SCROLLABLE + GRAVITY_FILL is not supported, GRAVITY_START will be used instead
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.Lifecycle.Runtime.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.Lifecycle.Runtime.dll [External]
[c2testsingleto] Explicit concurrent copying GC freed 877(254KB) AllocSpace objects, 0(0B) LOS objects, 24% free, 2741KB/3655KB, paused 342us total 48.881ms
[monodroid-assembly] open_from_bundles: failed to load assembly Xamarin.AndroidX.ViewPager.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Xamarin.AndroidX.ViewPager.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly SaxonCS.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/SaxonCS.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Console.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Console.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly XmlResolver.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/XmlResolver.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly NLog.dll
[monodroid-assembly] open_from_bundles: failed to load assembly mscorlib.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/NLog.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/mscorlib.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Xml.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Xml.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Core.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Core.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.IO.FileSystem.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Configuration.Xml.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Microsoft.Extensions.Configuration.Json.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.IO.FileSystem.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Configuration.Xml.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Microsoft.Extensions.Configuration.Json.dll [External]
Thread started: <Thread Pool> #5
Thread started: .NET ThreadPool Gate #6
Thread started: <Thread Pool> #7
Thread started: <Thread Pool> #8
Thread started: .NET Timers #9
[HostConnection] HostConnection::get() New Host Connection established 0x7d1a2c455790, tid 21905
[HostConnection] HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV_Cache ANDROID_EMU_vulkan_ignored_handles ANDROID_EMU_has_shared_slots_host_memory_allocator ANDROID_EMU_vulkan_free_memory_sync ANDROID_EMU_vulkan_shader_float16_int8 ANDROID_EMU_vulkan_async_queue_submit ANDROID_EMU_sync_buffer_data ANDROID_EMU_read_color_buffer_dma GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_2 
[OpenGLRenderer] Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
[EGL_emulation] eglCreateContext: 0x7d1a1c47d520: maj 2 min 0 rcv 2
[EGL_emulation] eglMakeCurrent: 0x7d1a1c47d520: ver 2 0 (tinfo 0x7d19bcbb8480) (first time)
[Gralloc4] mapper 4.x is not supported
[HostConnection] createUnique: call
[HostConnection] HostConnection::get() New Host Connection established 0x7d1a2c4553d0, tid 21905
[goldfish-address-space] allocate: Ask for block of size 0x100
[goldfish-address-space] allocate: ioctl allocate returned offset 0x3f3ffe000 size 0x2000
[HostConnection] HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV_Cache ANDROID_EMU_vulkan_ignored_handles ANDROID_EMU_has_shared_slots_host_memory_allocator ANDROID_EMU_vulkan_free_memory_sync ANDROID_EMU_vulkan_shader_float16_int8 ANDROID_EMU_vulkan_async_queue_submit ANDROID_EMU_sync_buffer_data ANDROID_EMU_read_color_buffer_dma GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_gles_max_version_2 
[OpenGLRenderer] Davey! duration=1137ms; Flags=1, IntendedVsync=127756716479665, Vsync=127756749812997, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=127756758813660, AnimationStart=127756758848560, PerformTraversalsStart=127756758886760, DrawStart=127757325535760, SyncQueued=127757498359460, SyncStart=127757742044360, IssueDrawCommandsStart=127757742243760, SwapBuffers=127757986636660, FrameCompleted=127758097316560, DequeueBufferDuration=399400, QueueBufferDuration=1630300, GpuCompleted=618475290624, 
[Choreographer] Skipped 79 frames!  The application may be doing too much work on its main thread.
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Intrinsics.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Intrinsics.dll [External]
Thread started: <Thread Pool> #10
[monodroid-assembly] open_from_bundles: failed to load assembly System.Security.Cryptography.Algorithms.dll
[monodroid-assembly] open_from_bundles: failed to load assembly System.Security.Cryptography.Primitives.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Security.Cryptography.Algorithms.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Security.Cryptography.Primitives.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Security.Cryptography.Encoding.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Security.Cryptography.Encoding.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Formats.Asn1.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Formats.Asn1.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly System.Runtime.Numerics.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/System.Runtime.Numerics.dll [External]
[monodroid-assembly] open_from_bundles: failed to load assembly Singulink.Numerics.BigDecimal.dll
[monodroid-assembly] open_from_bundles: failed to load assembly Singulink.Numerics.BigIntegerExtensions.dll
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Singulink.Numerics.BigDecimal.dll [External]
Loaded assembly: /data/data/com.companyname.saxoncs113mauirc2testsingleton/files/.__override__/Singulink.Numerics.BigIntegerExtensions.dll [External]
[libc] Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x10 in tid 21830 (c2testsingleton), pid 21830 (c2testsingleton)

[martin-honnen]

I have to slightly adjust my description, the project as uploaded doesn't run without having the saxon-license.lic file to the project as a MAUI asset as I have included code to copy the license from the app package to the application folder (i.e. Environment.SpecialFolder.LocalApplicationData) to allow SaxonCS to read it.

If you want to run the code first to just check that loading SaxonCS.dll and creating the processor code and reading out ProductTitle is possible on both Windows and Android without having/installing the license file you would need to comment out the lines 17 and 18 of e.g.

			//CopyAssetToFile(licenseAsset, LicenseFile);
			//Environment.SetEnvironmentVariable(SAXON_LICENSE_DIR_NAME, Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData));

of the file MainPage.xaml.cs for that step and uncomment them once you have a license file added to later check the crash under Android.

[Redth]

@steveisok or @jonpryor any ideas how to get a bit more detail / output? I don't see anything helpful in the logs...

[jonathanpeppers]

Can you run this command to enable more logging?

adb shell setprop debug.mono.log default,timing,assembly,mono_log_level=debug,mono_log_mask=all

Then share the entire file with adb logcat -d > log.txt? Thanks!

Hi @martin-honnen. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dellis1972]

From the SaxonCS documentation "The product has been tested on .NET 5 only, on Windows, MacOS, and Linux. If you want to try it out on any other platform, please let us know how you get on.".

So there is a high probability that this will not work on Android at all. If they are accessing things internally which use the file system that can cause problems. As @jonathanpeppers said we need more detailed information. But this might be something that SaxonCS needs to fix itself.

[martin-honnen]

Can you run this command to enable more logging?

adb shell setprop debug.mono.log default,timing,assembly,mono_log_level=debug,mono_log_mask=all

Then share the entire file with adb logcat -d > log.txt? Thanks!

I tried pasting the part of the log file showing the latest run of the project of today but it was too long and got rejected. Now trying to attach that file below.
adblog2022050517.log