ArgumentException in DisposeFieldsAndPropertiesInTearDownAnalyzer

[MaceWindu]

Analyzer 'NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer' threw an exception of type 'System.ArgumentException' with message 'Syntax node is not within syntax tree'

1>    SyntaxNode: public partial class TestFixture ... [ClassDeclarationSyntax]@[17..158) (2,0)-(8,1)
1>    System.ArgumentException: Syntax node is not within syntax tree
1>    at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.CheckSyntaxNode(CSharpSyntaxNode syntax)
1>    at Microsoft.CodeAnalysis.CSharp.CSharpSemanticModel.GetSymbolInfo(ExpressionSyntax expression, CancellationToken cancellationToken)
1>    at Microsoft.CodeAnalysis.CSharp.CSharpExtensions.GetSymbolInfo(SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.Parameters.IsLocalMethodCall(InvocationExpressionSyntax invocationExpression, IMethodSymbol& calledMethod)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AssignedIn(Parameters parameters, HashSet`1 assignments, ExpressionSyntax expression)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AssignedIn(Parameters parameters, HashSet`1 assignments, SyntaxList`1 statements)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AssignedIn(Parameters parameters, HashSet`1 assignments, BaseMethodDeclarationSyntax method)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AssignedIn(Parameters parameters, HashSet`1 assignments, IMethodSymbol symbol)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AssignedIn(Parameters parameters, HashSet`1 assignments, IEnumerable`1 methods)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AnalyzeAssignedButNotDisposed(SyntaxNodeAnalysisContext context, Dictionary`2 symbols, Parameters parameters, String where, IEnumerable`1 setUpMethods, IEnumerable`1 tearDownMethods, HashSet`1 assignedWithInitializers)
1>    at NUnit.Analyzers.DisposeFieldsInTearDown.DisposeFieldsAndPropertiesInTearDownAnalyzer.AnalyzeDisposableFields(SyntaxNodeAnalysisContext context)
1>    at Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor.<>c__49`1.<ExecuteSyntaxNodeAction>b__49_0(ValueTuple`2 data)
1>    at Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor.ExecuteAndCatchIfThrows_NoLock[TArg](DiagnosticAnalyzer analyzer, Action`1 analyze, TArg argument, Nullable`1 info, CancellationToken cancellationToken)

NUnit: 3.14.0
NUnit.Analyzers: 3.9.0

using System;

public partial class TestFixture
{
    private static object Property
    {
        get => throw new NotImplementedException();
    }
}

using NUnit.Framework;
using System;

public partial class TestFixture
{
	[Test]
	public void SomeTest()
	{
		SomeAsserts();
	}

	private static void SomeAsserts() => throw new InvalidOperationException();
}

[manfred-brands]

Thanks @MaceWindu for the report.
I never used partial classes with nunit tests.
It looks as if it tries to find a symbol which is defined in the other partial part.

I have no access to a PC this weekend, but will look into this next week.

[manfred-brands]

@MaceWindu I can reproduce this in an nunit test.

If your property is readonly, a workaround might be to replace the get accessor with an expression:

private static object Property => throw new NotImplementedException();