Native Crash Reporting - Got a SIGSEGV while executing native code while debugging background threads

[georgivzh]

Steps to Reproduce

1. When debugging code that is in a background thread I got a random exception. Debugging in the main thread is Ok (there was a similar problem in VS 2019 16.1 but it has been fixed). The exception:

06-14 11:36:24.504 E/mono-rt (27806): /proc/self/maps:
=================================================================
	Native Crash Reporting
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

=================================================================

06-14 11:36:24.504 E/mono-rt (27806): 12c00000-52c00000 rw-p 00000000 00:01 36406                              /dev/ashmem/dalvik-main space (region space) (deleted)	Basic Fault Adddress Reporting
=================================================================
Memory around native instruction pointer (0xc9700b20):0xc9700b10  d0 1f 1e 00 70 1f 1e 00 10 00 90 e5 1e ff 2f e1  ....p........./.
0xc9700b20  08 00 90 e5 1e ff 2f e1 04 00 90 e5 1e ff 2f e1  ....../......./.
0xc9700b30  b0 20 d0 e1 00 10 a0 e1 01 00 a0 e3 01 0b 12 e3  . ..............
0xc9700b40  1e ff 2f 11 b2 10 d1 e1 03 30 01 e3 03 00 11 e1  ../......0......

No native Android stacktrace (see debuggerd output).

=================================================================
	Managed Stacktrace:
=================================================================
=================================================================

06-14 11:36:24.505 E/mono-rt (27806): 6f266000-6f44c000 rw-p 00000000 fd:01 432572                             /data/dalvik-cache/arm/system@framework@boot.art
06-14 11:36:24.505 E/mono-rt (27806): 6f44c000-6f509000 rw-p 00000000 fd:01 432575                             /data/dalvik-cache/arm/system@framework@boot-core-libart.art
06-14 11:36:24.505 E/mono-rt (27806): 6f509000-6f547000 rw-p 00000000 fd:01 432577                             /data/dalvik-cache/arm/system@framework@boot-conscrypt.art
06-14 11:36:24.505 E/mono-rt (27806): 6f547000-6f570000 rw-p 00000000 fd:01 432579                             /data/dalvik-cache/arm/system@framework@boot-okhttp.art
06-14 11:36:24.505 E/mono-rt (27806): 6f570000-6f574000 rw-p 00000000 fd:01 432581                             /data/dalvik-cache/arm/system@framework@boot-legacy-test.art
06-14 11:36:24.505 E/mono-rt (27806): 6f574000-6f5a6000 rw-p 00000000 fd:01 432583                             /data/dalvik-cache/arm/system@framework@boot-bouncycastle.art
06-14 11:36:24.505 E/mono-rt (27806): 6f5a6000-6f5d4000 rw-p 00000000 fd:01 432585                             /data/dalvik-cache/arm/system@framework@boot-ext.art
06-14 11:36:24.506 E/mono-rt (27806): 6f5d4000-6fb86000 rw-p 00000000 fd:01 432587                             /data/dalvik-cache/arm/system@framework@boot-framework.art
06-14 11:36:24.506 E/mono-rt (27806): 6fb86000-6fc13000 rw-p 00000000 fd:01 432589                             /data/dalvik-cache/arm/system@framework@boot-telephony-common.art
06-14 11:36:24.506 E/mono-rt (27806): 6fc13000-6fc1b000 rw-p 00000000 fd:01 432591                             /data/dalvik-cache/arm/system@framework@boot-voip-common.art
06-14 11:36:24.506 E/mono-rt (27806): 6fc1b000-6fc23000 rw-p 00000000 fd:01 432594                             /data/dalvik-cache/arm/system@framework@boot-ims-common.art
06-14 11:36:24.506 E/mono-rt (27806): 6fc23000-6fc38000 rw-p 00000000 fd:01 432595                             /data/dalvik-cache/arm/system@framework@boot-apache-xml.art
06-14 11:36:24.506 E/mono-rt (27806): 6fc38000-6fc56000 rw-p 00000000 fd:01 432597                             /data/dalvik-cache/arm/system@framework@boot-org.apache.http.legacy.boot.art
06-14 11:36:24.506 E/mono-rt (27806): 6fc56000-6fc57000 rw-p 00000000 fd:01 432599                             /data/dalvik-cache/arm/system@framework@boot-android.hidl.base-V1.0-java.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc57000-6fc5a000 rw-p 00000000 fd:01 432601                             /data/dalvik-cache/arm/system@framework@boot-android.hidl.manager-V1.0-java.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc5a000-6fc69000 rw-p 00000000 fd:01 432603                             /data/dalvik-cache/arm/system@framework@boot-com.lge.mdm.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc69000-6fc6a000 rw-p 00000000 fd:01 432605                             /data/dalvik-cache/arm/system@framework@boot-QPerformance.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc6a000-6fc6b000 rw-p 00000000 fd:01 432607                             /data/dalvik-cache/arm/system@framework@boot-tcmiface.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc6b000-6fc6d000 rw-p 00000000 fd:01 432609                             /data/dalvik-cache/arm/system@framework@boot-telephony-ext.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc6d000-6fc72000 rw-p 00000000 fd:01 432611                             /data/dalvik-cache/arm/system@framework@boot-WfdCommon.art
06-14 11:36:24.507 E/mono-rt (27806): 6fc72000-6fc73000 rw-p 00000000 fd:01 432613                             /data/dalvik-cache/arm/system@framework@boot-oem-services.art
06-14 11:36:24.508 E/mono-rt (27806): 6fc73000-6fc7a000 rw-p 00000000 fd:01 432615                             /data/dalvik-cache/arm/system@framework@boot-com.lge.fmradio.nablabs.art
06-14 11:36:24.508 E/mono-rt (27806): 6fc7a000-6fe4b000 r--p 00000000 fd:00 4240                               /system/framework/arm/boot.oat
06-14 11:36:24.508 E/mono-rt (27806): 6fe4b000-70446000 r-xp 001d1000 fd:00 4240                               /system/framework/arm/boot.oat
06-14 11:36:24.521 F/libc    (27806): Fatal signal 11 (SIGSEGV), code 1, fault addr 0x8 in tid 27832 (Debugger agent)
Step request failed: Exception of type 'Mono.Debugger.Soft.VMDisconnectedException' was thrown.

Reproduce using the following configuration:

Microsoft Visual Studio Community 2019
Version 16.1.3
VisualStudio.16.Release/16.1.3+29009.5
Microsoft .NET Framework
Version 4.7.03062

Installed Version: Community

Visual C++ 2019   00435-60000-00000-AA808
Microsoft Visual C++ 2019

ADL Tools Service Provider   1.0
This package contains services used by Data Lake tools

ASP.NET and Web Tools 2019   16.1.429.50124
ASP.NET and Web Tools 2019

ASP.NET Web Frameworks and Tools 2019   16.1.429.50124
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   16.1.429.50124
Azure App Service Tools v3.0.0

Azure Data Lake Node   1.0
This package contains the Data Lake integration nodes for Server Explorer.

Azure Data Lake Tools for Visual Studio   2.3.9000.0
Microsoft Azure Data Lake Tools for Visual Studio

Azure Functions and Web Jobs Tools   16.1.429.50124
Azure Functions and Web Jobs Tools

Azure Stream Analytics Tools for Visual Studio   2.3.9000.0
Microsoft Azure Stream Analytics Tools for Visual Studio

C# Tools   3.1.1-beta4-19281-06+58a4b1e79aea28115e66b06f850c83a3f1fcb6d3
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools   1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Extensibility Message Bus   1.1.77 (master@24013d5)
Provides common messaging-based MEF services for loosely coupled Visual Studio extension components communication and integration.

Fabric.DiagnosticEvents   1.0
Fabric Diagnostic Events

IntelliCode Extension   1.0
IntelliCode Visual Studio Extension Detailed Info

Microsoft Azure HDInsight Azure Node   2.3.9000.0
HDInsight Node under Azure Node

Microsoft Azure Hive Query Language Service   2.3.9000.0
Language service for Hive query

Microsoft Azure Service Fabric Tools for Visual Studio   2.5
Microsoft Azure Service Fabric Tools for Visual Studio

Microsoft Azure Stream Analytics Language Service   2.3.9000.0
Language service for Azure Stream Analytics

Microsoft Azure Stream Analytics Node   1.0
Azure Stream Analytics Node under Azure Node

Microsoft Azure Tools   2.9
Microsoft Azure Tools for Microsoft Visual Studio 0x10 - v2.9.20419.2

Microsoft Continuous Delivery Tools for Visual Studio   0.4
Simplifying the configuration of Azure DevOps pipelines from within the Visual Studio IDE.

Microsoft JVM Debugger   1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

Microsoft Library Manager   1.0
Install client-side libraries easily to any web project

Microsoft MI-Based Debugger   1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual C++ Wizards   1.0
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Microsoft Visual Studio Tools for Containers   1.1
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.

Microsoft Visual Studio VC Package   1.0
Microsoft Visual Studio VC Package

Mono Debugging for Visual Studio   16.1.1 (2473f22)
Support for debugging Mono processes with Visual Studio.

NuGet Package Manager   5.1.0
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

ProjectServicesPackage Extension   1.0
ProjectServicesPackage Visual Studio Extension Detailed Info

ResourcePackage Extension   1.0
ResourcePackage Visual Studio Extension Detailed Info

ResourcePackage Extension   1.0
ResourcePackage Visual Studio Extension Detailed Info

SettingsCommands Extension   1.0
SettingsCommands Visual Studio Extension Detailed Info

SQL Server Data Tools   16.0.61904.23160
Microsoft SQL Server Data Tools

Test Adapter for Boost.Test   1.0
Enables Visual Studio's testing tools with unit tests written for Boost.Test.  The use terms and Third Party Notices are available in the extension installation directory.

Test Adapter for Google Test   1.0
Enables Visual Studio's testing tools with unit tests written for Google Test.  The use terms and Third Party Notices are available in the extension installation directory.

ToolWindowHostedEditor   1.0
Hosting json editor into a tool window

TypeScript Tools   16.0.10506.2004
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools   3.1.1-beta4-19281-06+58a4b1e79aea28115e66b06f850c83a3f1fcb6d3
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Visual F# Tools 10.4 for F# 4.6   16.1.0-beta.19253.3+42526fe359672a05fd562dc16a91a43d0fe047a7
Microsoft Visual F# Tools 10.4 for F# 4.6

Visual Studio Code Debug Adapter Host Package   1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio

Visual Studio Spell Check Everywhere   VSSpellCheckEverywhere
An extension that enables spell checking within any Visual Studio file editor or tool window that uses WPF text boxes.
https://GitHub.com/EWSoftware/VSSpellChecker

Visual Studio Spell Checker   VSSpellChecker
An editor extension that checks the spelling of comments, strings, and plain text as you type or interactively with tool windows.
https://GitHub.com/EWSoftware/VSSpellChecker

Visual Studio Tools for CMake   1.0
Visual Studio Tools for CMake

Visual Studio Tools for CMake   1.0
Visual Studio Tools for CMake

Visual Studio Tools for Containers   1.0
Visual Studio Tools for Containers

Visual Studio Tools for Kubernetes   1.0
Visual Studio Tools for Kubernetes

Visual Studio Tools for Unity   4.1.1.0
Visual Studio Tools for Unity

VisualStudio.Mac   1.0
Mac Extension for Visual Studio

Xamarin   16.1.0.543 (d16-1@34a619991)
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Xamarin Designer   16.1.0.418 (remotes/origin/d16-1@5b958bb10)
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Xamarin Templates   16.2.112 (4db4af4)
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Xamarin.Android SDK   9.3.0.22 (HEAD/8e7764fdf)
Xamarin.Android Reference Assemblies and MSBuild support.
    Mono: mono/mono/2018-08@3cb36842fc4
    Java.Interop: xamarin/java.interop/d16-1@5ddc3e3
    LibZipSharp: grendello/LibZipSharp/d16-1@44de300
    LibZip: nih-at/libzip/rel-1-5-1@b95cf3f
    ProGuard: xamarin/proguard/master@905836d
    SQLite: xamarin/sqlite/3.27.1@8212a2d
    Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-1@acabd26


Xamarin.iOS and Xamarin.Mac SDK   12.10.0.153 (750a879)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.

[brendanzagaeski]

Thanks for the report! This looks interesting. The fact that the (Debugger agent) thread is crashing looks roughly similar to mono/mono#12843, but the fix for that issue is already included in Xamarin.Android SDK version 9.3 in Visual Studio 2019 version 16.1, so the behavior you are seeing is likely something different.

I tried a simple initial test of stepping through a few lines of code in a background thread in a small test app on an armeabi-v7a device, but unfortunately I haven't yet been able to reproduce the crash, so we'll need a bit more information to help investigate this issue. When you get chance, if you might be able to provide some of the following information, that would be perfect:

• If possible, if you might be able to zip up and share a project that reproduces the issue for you, that would be excellent. If attaching the project to this GitHub issue publicly won't work, then a couple other options are:

  • Send a one to one message to me on Gitter, for example using a /query @brendanzagaeski command from within the Xamarin.Android Gitter channel, and we can coordinate on another way to send the file non-publicly.
  • Or use Help > Send Feedback > Report a Problem from within Visual Studio to create an item on Visual Studio Developer Community. Those allow private attachments.

• In either case (whether you can share a project right away or not), if you can collect and attach back the adb logcat log from the crash, that would be useful:

  1. Open Tools > Android > Android Adb Command Prompt.

  2. Run the following command to clear the log on the device:

     adb logcat -c

  3. Repeat the app crash once more.

  4. Run the following command to collect the log from the device:

     adb logcat -d > "%USERPROFILE%\Desktop\adblogcat.txt"
     

  5. Attach back the adblogcat.txt file from your desktop, or if you prefer, copy and paste just the section of it that starts with the "E/mono-rt" lines you included in the error.txt from the original description description and ends after the section that starts with a "Build fingerprint:" line and includes a "backtrace:" section (the native backtrace).

  The additional "backtrace:" information will often contain the name of the native function where the app exited unexpectedly, which can be helpful to distinguish among different native crashes.

Thanks in advance!

[brendanzagaeski]

One other way to share a project privately that might be even easier:

• Put the example in a private GitHub repository, and add me (brendanzagaeski) as a collaborator.

[georgivzh]

adblogcat.txt

[brendanzagaeski]

Thanks for the log file! Curiously, it looks like that log file didn't capture any instances of the same crash from the original description. For example, there aren't any "E/mono-rt" lines in this log file. It looks like the app might have been stopped from the IDE via the "stop debugging" action. But if the IDE was stopping the app unexpectedly in some of these cases, that would be definitely be an issue.

If you're still sometimes seeing crashes where the debug output shows "E/mono-rt", then if you get a chance to try collecting the adb logcat once more, that would be perfect. Hopefully it was just a fluke that it didn't capture the crash last time, and it'll capture the crash information this time. Thanks for your patience with this retrying!

[georgivzh]

I have reproduced it again. I see now E/mono-rt in the adblogcat. Maybe I haven't "catched" the correct timeframe in the previous log file.
adblogcat.txt
VisualStudioOutput.txt

[acaliaro]

Installed VS2019 yesterday...

=================================================================
Native Crash Reporting

Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.

=================================================================
Basic Fault Adddress Reporting

Memory around native instruction pointer (0x7f7f5fe678):0x7f7f5fe668 00 1c 40 b9 c0 03 5f d6 fd 7b bf a9 fd 03 00 91 ..@.....{......
0x7f7f5fe678 08 20 40 b9 a8 00 c8 37 88 01 e0 37 00 00 40 f9 . @....7...7..@.
0x7f7f5fe688 fd 7b c1 a8 c0 03 5f d6 60 08 00 b0 01 0a 00 f0 .{.....`.......
0x7f7f5fe698 03 0a 00 f0 00 24 06 91 21 80 08 91 63 8c 0a 91 .....$..!...c...

No native Android stacktrace (see debuggerd output).

=================================================================
Managed Stacktrace:

  at <unknown> <0xffffffff>
  at System.Reflection.MonoCMethod:InternalInvoke <0x00007>
  at System.Reflection.MonoCMethod:InternalInvoke <0x000b3>
  at System.RuntimeType:CreateInstanceMono <0x003cb>
  a

06-25 10:52:22.629 E/mono-rt ( 5600): /proc/self/maps:t System.RuntimeType:CreateInstanceSlow <0x000b7>
at System.RuntimeType:CreateInstanceDefaultCtor <0x000fb>
at System.Activator:CreateInstance <0x001cf>
at System.Activator:CreateInstance <0x0005f>
at System.Activator:CreateInstance <0x00057>
at <b__0>d:MoveNext <0x00313>
at System.Runtime.CompilerServices.AsyncVoidMethodBuilder:Start <0x0016f>
at <>c__DisplayClass27_0:b__0 <0x0027b>
at RunnableImplementor:Run <0x000bb>
at Java.Lang.IRunnableInvoker:n_Run <0x000c3>
at Android.Runtime.DynamicMethodNameCounter:32 <0x0001f>
at Android.Runtime.DynamicMethodNameCounter:32 <0x000c7>

06-25 10:52:22.629 E/mono-rt ( 5600): 12c00000-12da0000 rw-p 00000000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 12da0000-13149000 rw-p 001a0000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 13149000-1ec00000 ---p 00549000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 32c00000-32c01000 rw-p 00000000 00:04 11607 /dev/ashmem/dalvik-main space 1 (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 32c01000-3ec00000 ---p 00001000 00:04 11607 /dev/ashmem/dalvik-main space 1 (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 708b2000-71673000 rw-p 00000000 fe:01 425988 /data/dalvik-cache/arm64/system@framework@boot.art
06-25 10:52:22.629 E/mono-rt ( 5600): 71673000-73925000 r--p 00000000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 E/mono-rt ( 5600): 73925000-75eb4000 r-xp 022b2000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 E/mono-rt ( 5600): 75eb4000-75eb5000 rw-p 04841000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 E/mono-rt ( 5600): 75eb5000-75f9f000 rw-p 00000000 00:04 11605 /dev/ashmem/dalvik-zygote space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 75f9f000-75fa0000 rw-p 00000000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 75fa0000-75fbb000 rw-p 00001000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 75fbb000-78eb6000 ---p 0001c000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 78eb6000-79eb5000 rw-p 02f17000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): 79eb5000-99eb5000 rw-p 00000000 00:04 11616 /dev/ashmem/dalvik-free list large object space (deleted)
06-25 10:52:22.629 E/mono-rt ( 5600): bd4c0000-bd581000 rw-s 00019000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bd8af000-bd8c0000 rw-s 000b6000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdb10000-bdbd1000 rw-s 0006b000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdbe0000-bdbf1000 rw-s 000a4000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdc00000-bdc21000 rw-s 000a3000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdc30000-bdc41000 rw-s 000a2000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdc50000-bdc61000 rw-s 000a1000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdc70000-bdf01000 rw-s 000a0000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdf10000-bdf31000 rw-s 0008d000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 E/mono-rt ( 5600): bdf37000-bdf3a000 rw-s 000c2000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.631 F/libc ( 5600): Fatal signal 11 (SIGSEGV), code 1, fault addr 0x20 in tid 5600

06-25 10:52:22.629 5600-5600/ E/mono-rt: /proc/self/maps:
06-25 10:52:22.629 5600-5600/ E/mono-rt: 12c00000-12da0000 rw-p 00000000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 12da0000-13149000 rw-p 001a0000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 13149000-1ec00000 ---p 00549000 00:04 11606 /dev/ashmem/dalvik-main space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 32c00000-32c01000 rw-p 00000000 00:04 11607 /dev/ashmem/dalvik-main space 1 (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 32c01000-3ec00000 ---p 00001000 00:04 11607 /dev/ashmem/dalvik-main space 1 (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 708b2000-71673000 rw-p 00000000 fe:01 425988 /data/dalvik-cache/arm64/system@framework@boot.art
06-25 10:52:22.629 5600-5600/ E/mono-rt: 71673000-73925000 r--p 00000000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 5600-5600/ E/mono-rt: 73925000-75eb4000 r-xp 022b2000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 5600-5600/ E/mono-rt: 75eb4000-75eb5000 rw-p 04841000 fe:00 1715 /system/framework/arm64/boot.oat
06-25 10:52:22.629 5600-5600/ E/mono-rt: 75eb5000-75f9f000 rw-p 00000000 00:04 11605 /dev/ashmem/dalvik-zygote space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 75f9f000-75fa0000 rw-p 00000000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 75fa0000-75fbb000 rw-p 00001000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 75fbb000-78eb6000 ---p 0001c000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 78eb6000-79eb5000 rw-p 02f17000 00:04 15539 /dev/ashmem/dalvik-non moving space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: 79eb5000-99eb5000 rw-p 00000000 00:04 11616 /dev/ashmem/dalvik-free list large object space (deleted)
06-25 10:52:22.629 5600-5600/ E/mono-rt: bd4c0000-bd581000 rw-s 00019000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bd8af000-bd8c0000 rw-s 000b6000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdb10000-bdbd1000 rw-s 0006b000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdbe0000-bdbf1000 rw-s 000a4000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdc00000-bdc21000 rw-s 000a3000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdc30000-bdc41000 rw-s 000a2000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdc50000-bdc61000 rw-s 000a1000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdc70000-bdf01000 rw-s 000a0000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdf10000-bdf31000 rw-s 0008d000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.629 5600-5600/ E/mono-rt: bdf37000-bdf3a000 rw-s 000c2000 00:0c 6642 /dev/kgsl-3d0
06-25 10:52:22.631 5600-5600/ A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x20 in tid 5600

[tobiasschulz]

When is this gonna get released? The stable version of VS2019 has been completely broken for a month now!

[NickeManarin]

Indeed! This is a very serious blocking bug.