Adding same analyzer code to dictionary cause exception.

[Daniel-Markov]

Describe the bug
When added warnings as errors in my csproj:
PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'"
WarningsAsErrors $(WarningsAsErrors);NU1605;nullable WarningsAsErrors
PropertyGroup

PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'"
WarningsAsErrors$(WarningsAsErrors);NU1605;nullable WarningsAsErrors
PropertyGroup

And running the stryker it's throws an System.AggregateException

Logs
[2024-11-03T18:18:31.642Z] System.AggregateException: One or more errors occurred. (An item with the same key has already been added. Key: NU1605) (An item with the same key has already been added. Key: NU1605) (An item with the same key has already been added. Key: NU1605) (An item with the same key has already been added. Key: NU1605)

[2024-11-03T18:18:31.642Z] ---> System.ArgumentException: An item with the same key has already been added. Key: NU1605

[2024-11-03T18:18:31.642Z] at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior)

[2024-11-03T18:18:31.642Z] at System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)

[2024-11-03T18:18:31.642Z] at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable1 source, Func2 keySelector, Func2 elementSelector, IEqualityComparer1 comparer)

[2024-11-03T18:18:31.642Z] at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable1 source, Func2 keySelector, Func`2 elementSelector)

[2024-11-03T18:18:31.642Z] at Stryker.Core.Initialisation.Buildalyzer.IAnalyzerResultExtensions.GetDiagnosticOptions(IAnalyzerResult analyzerResult)

[2024-11-03T18:18:31.642Z] at Stryker.Core.Initialisation.Buildalyzer.IAnalyzerResultCSharpExtensions.GetCompilationOptions(IAnalyzerResult analyzerResult)

[2024-11-03T18:18:31.642Z] at Stryker.Core.Compiling.CsharpCompilingProcess.GetCSharpCompilation(IEnumerable`1 syntaxTrees)

[2024-11-03T18:18:31.642Z] at Stryker.Core.Compiling.CsharpCompilingProcess.GetSemanticModels(IEnumerable`1 syntaxTrees)

[2024-11-03T18:18:31.642Z] at Stryker.Core.MutationTest.CsharpMutationProcess.Mutate(MutationTestInput input)

[2024-11-03T18:18:31.642Z] at Stryker.Core.MutationTest.MutationTestProcess.Mutate()

[2024-11-03T18:18:31.642Z] at Stryker.Core.Initialisation.ProjectMutator.MutateProject(StrykerOptions options, MutationTestInput input, IReporter reporters)

[2024-11-03T18:18:31.642Z] at Stryker.Core.Initialisation.ProjectOrchestrator.<>c__DisplayClass7_0.b__0(MutationTestInput mutationTestInput)

[2024-11-03T18:18:31.642Z] at System.Threading.Tasks.Parallel.<>c__DisplayClass19_0`2.b__1(RangeWorker& currentWorker, Int64 timeout, Boolean& replicationDelegateYieldedBeforeCompletion)

Expected behavior
Just to work as usual

Desktop (please complete the following information):

• OS: Unix
• Type of project .NET Core 8
• Framework Version .NET Core 8
• Stryker Version 4.2.0

[dupdob]

Thanks for opening this issue. We are aware of the problem and the next release will provide the fix, see #3059.