StackOverflow for records implementing event from interface #49286
Description
Version Used:
Visual-Studio-2019-Version-16.8
Visual-Studio-2019-Version-16.9-Preview-1
🔗 Also filed as AB#1246298
Steps to Reproduce:
Compile this snippet under .NET 5 / C# 9:
using System;
public interface IFoo
{
event EventHandler Event;
}
public record Foo : IFoo
{
event EventHandler IFoo.Event { add { } remove { } }
event EventHandler Event { add { } remove { } }
}Expected Behavior:
It should compile (the same way as class does).
Actual Behavior:
C:\Program Files\dotnet\sdk\5.0.100\Roslyn\Microsoft.CSharp.Core.targets(71,5): error : Stack overflow. [c:\Projects\Triage\Net5.CSharp9\Net5.CSharp9.csproj]
I'm not sure where's the entry point, but it loops like this:
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventSymbol.ComputeIsWindowsRuntimeEvent()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventSymbol.get_IsWindowsRuntimeEvent()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventAccessorSymbol.MethodChecks(Microsoft.CodeAnalysis.DiagnosticBag)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberMethodSymbol.LazyMethodChecks()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventAccessorSymbol.get_Parameters()
at Microsoft.CodeAnalysis.CSharp.Symbols.MethodSymbol.get_ParameterCount()
at Microsoft.CodeAnalysis.CSharp.Symbols.SymbolExtensions.GetParameterCount(Microsoft.CodeAnalysis.CSharp.Symbol)
at Microsoft.CodeAnalysis.CSharp.Symbols.MemberSignatureComparer.GetHashCode(Microsoft.CodeAnalysis.CSharp.Symbol)
at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].FindValue(System.__Canon)
at System.Collections.Generic.Dictionary`2[[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ContainsKey(System.__Canon)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.AddSynthesizedRecordMembersIfNecessary(MembersAndInitializersBuilder, Microsoft.CodeAnalysis.DiagnosticBag)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.BuildMembersAndInitializers(Microsoft.CodeAnalysis.DiagnosticBag)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.GetMembersAndInitializers()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.MakeAllMembers(Microsoft.CodeAnalysis.DiagnosticBag)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.GetMembersByNameSlow()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.GetMembersByName()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceMemberContainerTypeSymbol.GetMembersUnordered()
at Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol.MakeExplicitInterfaceImplementationMap()
at Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol.GetExplicitImplementationForInterfaceMember(Microsoft.CodeAnalysis.CSharp.Symbol)
at Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol.ComputeImplementationForInterfaceMember(Microsoft.CodeAnalysis.CSharp.Symbol, Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol, Microsoft.CodeAnalysis.DiagnosticBag, Boolean, Boolean ByRef)
at Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol.ComputeImplementationAndDiagnosticsForInterfaceMember(Microsoft.CodeAnalysis.CSharp.Symbol, Boolean, Boolean ByRef)
at Microsoft.CodeAnalysis.CSharp.Symbols.TypeSymbol.FindImplementationForInterfaceMemberInNonInterfaceWithDiagnostics(Microsoft.CodeAnalysis.CSharp.Symbol, Boolean)
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventSymbol.ComputeIsWindowsRuntimeEvent()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventSymbol.get_IsWindowsRuntimeEvent()
at Microsoft.CodeAnalysis.CSharp.Symbols.SourceEventAccessorSymbol.MethodChecks(Microsoft.CodeAnalysis.DiagnosticBag)
Side effects:
Just opening this file in a Visual Studio causes the crash. The file doesn't have to be part of any project. No error is displayed due to StackOverflow nature.