COMAnalyzer NullReferenceException in Maui Essentials #2686
Description
I'm getting the following error when setting IsTrimmable=true for the Maui Essentials project and building with msbuild Essentials.csproj -p:Configuration=Release -t:Rebuild /bl:
Errors
CSC error AD0001: Analyzer 'ILLink.RoslynAnalyzer.COMAnalyzer' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [C:\git\maui\src\Essentials\src\Essentials.csproj]
Exception occurred with following context:
Compilation: Microsoft.Maui.Essentials
IOperation: Invocation
SyntaxTree: C:\git\maui\src\Essentials\src\DeviceDisplay\DeviceDisplay.uwp.cs
SyntaxNode: EnumDisplaySettings(mi.Value.DeviceNameToLPTStr ... [InvocationExpressionSyntax]@[2465..2533) (101,3)-(101,71)
System.NullReferenceException: Object reference not set to an instance of an object.
at ILLink.RoslynAnalyzer.COMAnalyzer.<Initialize>g__IsComInterop|6_1(ISymbol symbol)
at ILLink.RoslynAnalyzer.COMAnalyzer.<>c.<Initialize>b__6_2(OperationAnalysisContext operationContext)
at Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor.<>c.<ExecuteOperationAction>b__63_0(ValueTuple`2 data)
at Microsoft.CodeAnalysis.Diagnostics.AnalyzerExecutor.ExecuteAndCatchIfThrows_NoLock[TArg](DiagnosticAnalyzer analyzer, Action`1 analyze, TArg argument, Nullable`1 info)
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Suppress the following diagnostics to disable this analyzer: IL2050
CompilerServer: server - server processed compilation - 1477aa4a-10c1-4109-b699-b092d24b4231
This looks like #2622, but I believe it is a different issue because this method isn't using a pointer, and because the version of the ILLink.RoslynAnalyzer assembly I'm using is from https://github.com/dotnet/linker/commits/e9cfb5413a6a7a7b5bfc3b9a73671be2b18642cf, which has the fix for #2622.
To Repro
- git clone https://github.com/dotnet/maui
- check out this commit: dotnet/maui@7a6d62f
C:\git\maui\src\Essentials\src>msbuild Essentials.csproj -p:Configuration=Release -t:Rebuild /bl
cc @tlakollo