NRE in System.Text.RegularExpresssions on ARM64 #78340

anmalkov · 2022-11-11T19:17:05Z

Steps to reproduce

Create a new app in VS from template "ASP.NET Core with React.js"
Name a project and solution as "testspa"
Select .NET 7
Create Dockerfile in the solution file directory:

FROM mcr.microsoft.com/dotnet/aspnet:7.0-jammy-arm64v8 AS base
RUN apt-get update
RUN apt-get install -y curl
RUN apt-get install -y libpng-dev libjpeg-dev curl libxi6 build-essential libgl1-mesa-glx
RUN curl -sL https://deb.nodesource.com/setup_lts.x | bash -
RUN apt-get install -y nodejs
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:7.0-jammy-arm64v8 AS build
RUN apt-get update
RUN apt-get install -y curl
RUN apt-get install -y libpng-dev libjpeg-dev curl libxi6 build-essential libgl1-mesa-glx
RUN curl -sL https://deb.nodesource.com/setup_lts.x | bash -
RUN apt-get install -y nodejs
WORKDIR /src
COPY ["testspa/testspa.csproj", "testspa/"]
RUN dotnet restore "testspa/testspa.csproj"
COPY . .
WORKDIR "/src/testspa"
RUN dotnet build "testspa.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "testspa.csproj" -c Release -o /app/publish /p:UseAppHost=false

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "testspa.dll"]

Open terminal and go to solution directory
Build an image:

docker build -t testspa .

Expected result:

A solution should be built and container image should be created

Actual result:

dotnet restore command fails with:

------
 > [build  9/12] RUN dotnet restore "testspa/testspa.csproj":
dotnet/msbuild#21 15.85 MSBUILD : error : This is an unhandled exception in MSBuild -- PLEASE UPVOTE AN EXISTING ISSUE OR FILE A NEW ONE AT https://aka.ms/msbuild/unhandled. [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :     System.NullReferenceException: Object reference not set to an instance of an object. [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Regex1_Scan(RegexRunner, ReadOnlySpan`1) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String inputString, ReadOnlySpan`1 inputSpan, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.MetadataExpander.ExpandMetadataLeaveEscaped(String expression, IMetadataTable metadata, ExpanderOptions options, IElementLocation elementLocation) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ExpandIntoStringLeaveEscaped(String expression, ExpanderOptions options, IElementLocation elementLocation, LoggingContext loggingContext) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionElement(ProjectItemDefinitionElement itemDefinitionElement) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionGroupElement(ProjectItemDefinitionGroupElement itemDefinitionGroupElement) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, Project project, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance.Initialize(ProjectRootElement xml, IDictionary`2 globalProperties, String explicitToolsVersion, String explicitSubToolsetVersion, Int32 visualStudioVersionFromSolution, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings, EvaluationContext evaluationContext) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.<>c__DisplayClass60_0.<LoadProjectIntoConfiguration>b__0() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.InitializeProject(BuildParameters buildParameters, Func`1 loadProjectFromFile) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildProject() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildAndReport() [/src/testspa/testspa.csproj]
------

Debian

If you try to do the same but with the base image with tag 7.0-bullseye-slim-arm64v8 which is based on Debian, the dotnet restore command also fails with:

------
 > [build  9/12] RUN dotnet restore "testspa/testspa.csproj":
dotnet/msbuild#22 17.28 /usr/share/dotnet/sdk/7.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(55,5): error MSB4184: The expression "[MSBuild]::GetTargetFrameworkVersion(net7.0, 2)" cannot be evaluated. Exception has been thrown by the target of an invocation. [/src/testspa/testspa.csproj]
------

.NET 7 on Linux amd64

Everything works well if I use the base images with the tag "7.0" which is targeted amd64. So, it is an ARM issue.

.NET 6 on ARM

If you run the same on .NET6 everything works perfectly with Ubuntu and Debian base images for ARM64v8.

The text was updated successfully, but these errors were encountered:

rainersigwald · 2022-11-14T20:29:40Z

@anmalkov is the host machine you're running on ARM64, or are you using Docker's built in qemu ARM64 emulation?

The expression "[MSBuild]::GetTargetFrameworkVersion(net7.0, 2)" cannot be evaluated. Exception has been thrown by the target of an invocation.

This one is tracked by NuGet/Home#12227.

rainersigwald · 2022-11-14T20:41:46Z

I don't see anything in the MSBuild-layer calls to RegularExpression.Replace that look fishy (or have been touched in a couple years)

https://github.com/dotnet/msbuild/blob/d14b74d6f08ab7f2e17706359a38f8c22b569cb5/src/Build/Evaluation/Expander.cs#L901-L957

So I'm going to rename + reroute this to the regex folks in dotnet/runtime.

dotnet-issue-labeler · 2022-11-14T20:44:55Z

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

ghost · 2022-11-15T16:25:07Z

Tagging subscribers to this area: @dotnet/area-system-text-regularexpressions
See info in area-owners.md if you want to be subscribed.

Issue Details

Steps to reproduce

Create a new app in VS from template "ASP.NET Core with React.js"
Name a project and solution as "testspa"
Select .NET 7
Create Dockerfile in the solution file directory:

FROM mcr.microsoft.com/dotnet/aspnet:7.0-jammy-arm64v8 AS base
RUN apt-get update
RUN apt-get install -y curl
RUN apt-get install -y libpng-dev libjpeg-dev curl libxi6 build-essential libgl1-mesa-glx
RUN curl -sL https://deb.nodesource.com/setup_lts.x | bash -
RUN apt-get install -y nodejs
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:7.0-jammy-arm64v8 AS build
RUN apt-get update
RUN apt-get install -y curl
RUN apt-get install -y libpng-dev libjpeg-dev curl libxi6 build-essential libgl1-mesa-glx
RUN curl -sL https://deb.nodesource.com/setup_lts.x | bash -
RUN apt-get install -y nodejs
WORKDIR /src
COPY ["testspa/testspa.csproj", "testspa/"]
RUN dotnet restore "testspa/testspa.csproj"
COPY . .
WORKDIR "/src/testspa"
RUN dotnet build "testspa.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "testspa.csproj" -c Release -o /app/publish /p:UseAppHost=false

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "testspa.dll"]

Open terminal and go to solution directory
Build an image:

docker build -t testspa .

Expected result:

A solution should be built and container image should be created

Actual result:

dotnet restore command fails with:

------
 > [build  9/12] RUN dotnet restore "testspa/testspa.csproj":
dotnet/msbuild#21 15.85 MSBUILD : error : This is an unhandled exception in MSBuild -- PLEASE UPVOTE AN EXISTING ISSUE OR FILE A NEW ONE AT https://aka.ms/msbuild/unhandled. [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :     System.NullReferenceException: Object reference not set to an instance of an object. [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Regex1_Scan(RegexRunner, ReadOnlySpan`1) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String inputString, ReadOnlySpan`1 inputSpan, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.MetadataExpander.ExpandMetadataLeaveEscaped(String expression, IMetadataTable metadata, ExpanderOptions options, IElementLocation elementLocation) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ExpandIntoStringLeaveEscaped(String expression, ExpanderOptions options, IElementLocation elementLocation, LoggingContext loggingContext) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionElement(ProjectItemDefinitionElement itemDefinitionElement) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionGroupElement(ProjectItemDefinitionGroupElement itemDefinitionGroupElement) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, Project project, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance.Initialize(ProjectRootElement xml, IDictionary`2 globalProperties, String explicitToolsVersion, String explicitSubToolsetVersion, Int32 visualStudioVersionFromSolution, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings, EvaluationContext evaluationContext) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.<>c__DisplayClass60_0.<LoadProjectIntoConfiguration>b__0() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.InitializeProject(BuildParameters buildParameters, Func`1 loadProjectFromFile) [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildProject() [/src/testspa/testspa.csproj]
dotnet/msbuild#21 15.85 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildAndReport() [/src/testspa/testspa.csproj]
------

Debian

If you try to do the same but with the base image with tag 7.0-bullseye-slim-arm64v8 which is based on Debian, the dotnet restore command also fails with:

------
 > [build  9/12] RUN dotnet restore "testspa/testspa.csproj":
dotnet/msbuild#22 17.28 /usr/share/dotnet/sdk/7.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(55,5): error MSB4184: The expression "[MSBuild]::GetTargetFrameworkVersion(net7.0, 2)" cannot be evaluated. Exception has been thrown by the target of an invocation. [/src/testspa/testspa.csproj]
------

.NET 7 on Linux amd64

Everything works well if I use the base images with the tag "7.0" which is targeted amd64. So, it is an ARM issue.

.NET 6 on ARM

If you run the same on .NET6 everything works perfectly with Ubuntu and Debian base images for ARM64v8.

Author:	anmalkov
Assignees:	-
Labels:	`area-System.Text.RegularExpressions`, `untriaged`
Milestone:	-

anmalkov · 2022-11-17T12:43:52Z

@anmalkov is the host machine you're running on ARM64, or are you using Docker's built in qemu ARM64 emulation?

I'm building the image on Windows 11, so, on emulation. However, I want to run the container on ARM64

omanikhi · 2023-04-12T16:32:07Z

So 7.x will not be usable on arm64 devices and we need to wait for 8.0?!

stephentoub · 2023-04-12T17:46:14Z

We run a bazillion regex tests on ARM64, and to my knowledge we've never seen such an NRE. It's far from "not usable".

Do you have a standalone repro with just regex that shows the problem you're hitting?

omanikhi · 2023-04-12T18:48:40Z

We run a bazillion regex tests on ARM64, and to my knowledge we've never seen such an NRE. It's far from "not usable".

Do you have a standalone repro with just regex that shows the problem you're hitting?

You're absolutely right about it being far from "not usable", perhaps I was a bit overdramatic in my choice of words.

It actually doesn't happen directly on ARM64 but rather under QEMU emulation of ARM64 (on Ubuntu over x64 in our case) which should be a common production build practice building the project on a non-ARM64 CI server.

I don't have a standalone example that reproduces it but I can certainly try to get one together if it helps.

stephentoub · 2023-04-12T18:53:22Z

Thanks.

@richlander, @AndyAyersMS, do we support / test QEMU emulation of ARM64 on .NET 7?

I'm struggling at the moment to see how this could be an issue specific to regex.

AndyAyersMS · 2023-04-12T19:29:08Z

I don't believe running under QEMU is officially supported, but it would be nice if it worked. My guess is that this indicates a problem in QEMU.

IIRC there is some kind of verbose mode where QEMU can give you more details when it hits something it does not expect. @RobertHenry6bev ran into something like this (though he was emulating x64, not arm64) -- maybe he can suggest how to diagnose these cases.

moo-the-cow · 2023-06-05T07:02:35Z

same issue:
on WSL2 (ubuntu jammy x86_x64)
when I run docker buildx bake -f docker-compose.yaml
edit: for testing reason I also tried docker buildx build -t test --platform linux/arm64 . same result
for ARM64 build
used image: mcr.microsoft.com/dotnet/sdk:7.0-jammy-arm64v8

[build 5/6] RUN dotnet restore:
#0 7.385 MSBUILD : error : This is an unhandled exception in MSBuild -- PLEASE UPVOTE AN EXISTING ISSUE OR FILE A NEW ONE AT https://aka.ms/msbuild/unhandled. [/app/aspnetapp/proj.csproj]
#0 7.385 MSBUILD : error :     System.NullReferenceException: Object reference not set to an instance of an object. [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Regex1_Scan(RegexRunner, ReadOnlySpan`1) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String inputString, ReadOnlySpan`1 inputSpan, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.MetadataExpander.ExpandMetadataLeaveEscaped(String expression, IMetadataTable metadata, ExpanderOptions options, IElementLocation elementLocation) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ExpandIntoStringLeaveEscaped(String expression, ExpanderOptions options, IElementLocation elementLocation, LoggingContext loggingContext) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionElement(ProjectItemDefinitionElement itemDefinitionElement) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.EvaluateItemDefinitionGroupElement(ProjectItemDefinitionGroupElement itemDefinitionGroupElement) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate(IEvaluatorData`4 data, Project project, ProjectRootElement root, ProjectLoadSettings loadSettings, Int32 maxNodeCount, PropertyDictionary`1 environmentProperties, ILoggingService loggingService, IItemFactory`2 itemFactory, IToolsetProvider toolsetProvider, ProjectRootElementCacheBase projectRootElementCache, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, EvaluationContext evaluationContext, Boolean interactive) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance.Initialize(ProjectRootElement xml, IDictionary`2 globalProperties, String explicitToolsVersion, String explicitSubToolsetVersion, Int32 visualStudioVersionFromSolution, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings, EvaluationContext evaluationContext) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.Execution.ProjectInstance..ctor(String projectFile, IDictionary`2 globalProperties, String toolsVersion, BuildParameters buildParameters, ILoggingService loggingService, BuildEventContext buildEventContext, ISdkResolverService sdkResolverService, Int32 submissionId, Nullable`1 projectLoadSettings) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.<>c__DisplayClass61_0.<LoadProjectIntoConfiguration>b__0() [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.InitializeProject(BuildParameters buildParameters, Func`1 loadProjectFromFile) [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildProject() [/app/aspnetapp/proj.csproj]
#0 7.386 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildAndReport() [/app/aspnetapp/proj.csproj]

mhoeper · 2023-06-07T08:03:32Z

We are facing the same issue, too on Amazon Linux x86_x64

danmoseley · 2023-06-07T12:38:20Z

So neither of you are using QEMU?

mhoeper · 2023-06-07T14:42:11Z

Correct. The NullReferenceException happens as well locally, when I am building with Docker Desktop on Windows on my x86_x64 machine, using --platform linux/arm64 with FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build

stephentoub · 2023-06-07T14:49:24Z

So neither of you are using QEMU?

on my x86_x64 machine, using --platform linux/arm64

Targeting arm64 while running on x86/x64 hardware requires emulation. Is this ever happening without emulation?

mhoeper · 2023-06-07T19:56:02Z

Looks like this issue is reproducible as reported from multiple persons and a Nullreference Exception in Regex1_Scan. This is a programming mistake in Msbuild as null check missing and should be easy to fix, right?

stephentoub · 2023-06-07T20:23:22Z

Looks like this issue is reproducible as reported from multiple persons

All confirmed cases are using emulated arm64

This is a programming mistake in Msbuild as null check missing and should be easy to fix, right?

No.

danmoseley · 2023-06-07T21:59:18Z

@RobertHenry6bev do you have any suggestions folks can try to gather more info here, per suggestion above?

danmoseley · 2023-06-07T23:21:24Z

@jkotas what is the support status of .NET in QEMU -- and if not supported, how well is it known to work?

jkotas · 2023-06-07T23:44:57Z

Not supported. Documented here: https://github.com/dotnet/core/blob/main/release-notes/7.0/supported-os.md#qemu

It is known to be unusable for anything real.

danmoseley · 2023-06-07T23:46:56Z

OK, I'm going to close this as it's a QEMU issue. If anyone is encountering this but not in fact emulating arm64 please open a new issue.

rainersigwald changed the title ~~Unhandled error while building .NET 7 ASP.NET Core with React.js app on ARM64v8~~ NRE in System.Text.RegularExpresssions on ARM64 Nov 14, 2022

rainersigwald transferred this issue from dotnet/msbuild Nov 14, 2022

ghost added the untriaged New issue has not been triaged by the area owner label Nov 14, 2022

jeffschwMSFT added the area-System.Text.RegularExpressions label Nov 15, 2022

buyaa-n added this to the 8.0.0 milestone Nov 16, 2022

ghost removed the untriaged New issue has not been triaged by the area owner label Nov 16, 2022

This was referenced Nov 21, 2022

dotnet restore failing for empty project under arm64 dotnet/msbuild#8182

Closed

dotnet restore fails in Arm-based container on an x64 host machine NuGet/Home#12227

Closed

This was referenced Feb 28, 2023

[Unhandled Exception]: System.NullReferenceException: Object reference not set to an instance of an object. dotnet/msbuild#8508

Closed

Unhandled Exception (docker+linux/arm64) dotnet/msbuild#8534

Closed

marcpopMSFT mentioned this issue May 10, 2023

Strange errors in .NET SDK 7.0.105 ppc64le #86069

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ellismg mentioned this issue May 13, 2023

bicep build fails when run from within amd64/linux docker container on M1 Mac Azure/bicep#10681

Closed

danmoseley closed this as completed Jun 7, 2023

ghost locked as resolved and limited conversation to collaborators Jul 8, 2023

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NRE in System.Text.RegularExpresssions on ARM64 #78340

NRE in System.Text.RegularExpresssions on ARM64 #78340

anmalkov commented Nov 11, 2022 •

edited

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rainersigwald commented Nov 14, 2022

rainersigwald commented Nov 14, 2022

dotnet-issue-labeler bot commented Nov 14, 2022

ghost commented Nov 15, 2022

Steps to reproduce

Expected result:

Actual result:

Debian

.NET 7 on Linux amd64

.NET 6 on ARM

anmalkov commented Nov 17, 2022 •

edited

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omanikhi commented Apr 12, 2023

stephentoub commented Apr 12, 2023 •

edited

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omanikhi commented Apr 12, 2023

stephentoub commented Apr 12, 2023

AndyAyersMS commented Apr 12, 2023 •

edited

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mhoeper commented Jun 7, 2023

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jkotas commented Jun 7, 2023

danmoseley commented Jun 7, 2023

NRE in System.Text.RegularExpresssions on ARM64 #78340

NRE in System.Text.RegularExpresssions on ARM64 #78340

Comments

anmalkov commented Nov 11, 2022 • edited Loading

Steps to reproduce

Expected result:

Actual result:

Debian

.NET 7 on Linux amd64

.NET 6 on ARM

rainersigwald commented Nov 14, 2022

rainersigwald commented Nov 14, 2022

dotnet-issue-labeler bot commented Nov 14, 2022

ghost commented Nov 15, 2022

Steps to reproduce

Expected result:

Actual result:

Debian

.NET 7 on Linux amd64

.NET 6 on ARM

anmalkov commented Nov 17, 2022 • edited Loading

omanikhi commented Apr 12, 2023

stephentoub commented Apr 12, 2023 • edited Loading

omanikhi commented Apr 12, 2023

stephentoub commented Apr 12, 2023

AndyAyersMS commented Apr 12, 2023 • edited Loading

moo-the-cow commented Jun 5, 2023 • edited Loading

mhoeper commented Jun 7, 2023

danmoseley commented Jun 7, 2023

mhoeper commented Jun 7, 2023

stephentoub commented Jun 7, 2023

mhoeper commented Jun 7, 2023

stephentoub commented Jun 7, 2023

danmoseley commented Jun 7, 2023

danmoseley commented Jun 7, 2023

jkotas commented Jun 7, 2023

danmoseley commented Jun 7, 2023

anmalkov commented Nov 11, 2022 •

edited

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anmalkov commented Nov 17, 2022 •

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stephentoub commented Apr 12, 2023 •

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AndyAyersMS commented Apr 12, 2023 •

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moo-the-cow commented Jun 5, 2023 •

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