`dotnet restore` failing for empty project under arm64

I’m using docker buildx to build under and emulated arm64 environment, this may be a bug with buildx instead, but I do not have a native arm64 environment to test on and the error occurs inside msbuild.

 => ERROR [4/4] RUN dotnet restore                                                                                                                                                                                                   7.5s
------                                                                                                                                                                                                                                    
 > [4/4] RUN dotnet restore:                                                                                                                                                                                                              
#0 7.274 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. [/source/CrashSample.csproj]                                               
#0 7.274 MSBUILD : error :     System.NullReferenceException: Object reference not set to an instance of an object. [/source/CrashSample.csproj]                                                                                          
#0 7.274 MSBUILD : error :    at Regex1_Scan(RegexRunner, ReadOnlySpan`1) [/source/CrashSample.csproj]                                                                                                                                    
#0 7.274 MSBUILD : error :    at System.Text.RegularExpressions.Regex.ScanInternal(RegexRunnerMode mode, Boolean reuseMatchObject, String input, Int32 beginning, RegexRunner runner, ReadOnlySpan`1 span, Boolean returnNullIfReuseMatchObject) [/source/CrashSample.csproj]
#0 7.274 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) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at System.Text.RegularExpressions.Regex.RunAllMatchesWithCallback[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, RegexRunnerMode mode, Boolean reuseMatchObject) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ItemExpander.IntrinsicItemFunctions`1.ExpandQuotedExpressionFunction(Expander`2 expander, IElementLocation elementLocation, Boolean includeNullEntries, String functionName, IEnumerable`1 itemsOfType, String[] arguments)+MoveNext() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ItemExpander.Transform[S](Expander`2 expander, Boolean includeNullEntries, Stack`1 transformFunctionStack, IEnumerable`1 itemsOfType)+MoveNext() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ItemExpander.Transform[S](Expander`2 expander, Boolean includeNullEntries, Stack`1 transformFunctionStack, IEnumerable`1 itemsOfType)+MoveNext() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ItemExpander.ExpandExpressionCapture[S](Expander`2 expander, ItemExpressionCapture expressionCapture, IItemProvider`1 evaluatedItems, IElementLocation elementLocation, ExpanderOptions options, Boolean includeNullEntries, Boolean& isTransformExpression, List`1& itemsFromCapture) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Expander`2.ItemExpander.ExpandExpressionCaptureIntoItems[S,T](ItemExpressionCapture expressionCapture, Expander`2 expander, IItemProvider`1 items, IItemFactory`2 itemFactory, ExpanderOptions options, Boolean includeNullEntries, Boolean& isTransformExpression, IElementLocation elementLocation) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.LazyItemEvaluator`4.IncludeOperation.SelectItems(Builder listBuilder, ImmutableHashSet`1 globsToIgnore) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.LazyItemEvaluator`4.LazyItemOperation.ApplyImpl(Builder listBuilder, ImmutableHashSet`1 globsToIgnore) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.LazyItemEvaluator`4.LazyItemOperation.Apply(Builder listBuilder, ImmutableHashSet`1 globsToIgnore) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.LazyItemEvaluator`4.LazyItemList.ComputeItems(LazyItemList lazyItemList, ImmutableHashSet`1 globsToIgnore) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.LazyItemEvaluator`4.LazyItemList.GetItemData(ImmutableHashSet`1 globsToIgnore) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at System.Linq.Enumerable.SelectManySingleSelectorIterator`2.ToArray() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at System.Linq.Buffer`1..ctor(IEnumerable`1 source) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at System.Linq.OrderedEnumerable`1.GetEnumerator()+MoveNext() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.Evaluation.Evaluator`4.Evaluate() [/source/CrashSample.csproj]
#0 7.274 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) [/source/CrashSample.csproj]
#0 7.274 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) [/source/CrashSample.csproj]
#0 7.274 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) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.<>c__DisplayClass60_0.<LoadProjectIntoConfiguration>b__0() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.BackEnd.BuildRequestConfiguration.InitializeProject(BuildParameters buildParameters, Func`1 loadProjectFromFile) [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildProject() [/source/CrashSample.csproj]
#0 7.274 MSBUILD : error :    at Microsoft.Build.BackEnd.RequestBuilder.BuildAndReport() [/source/CrashSample.csproj]

Steps to reproduce:

1. dotnet new console -o CrashSample
2. cd CrashSample
3. touch Dockerfile

FROM mcr.microsoft.com/dotnet/sdk:7.0
WORKDIR /source
COPY *.csproj .
RUN dotnet restore

1. docker buildx build . --platform linux/arm64

Attempting the same build without buildx or buildx specifying linux/amd64 both run to completion.

Also, to note, this build fails with a different error when building against platform linux/arm/7. This error is not an msbuild unhandled exceptions so might not fit into the same category as above, but might be of use figuring out what’s going on.

 > [4/4] RUN dotnet restore:                                                                                                                                                                                                              
#0 4.280 /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. [/source/CrashSample.csproj]

Thanks!