Lightrun
question-mark
Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Failed to start with .NET 6.0 rc2

See original GitHub issue

Exception at start:

C:\Windows\system32>smtp4dev
smtp4dev version 3.1.1
https://github.com/rnwood/smtp4dev

.NET Core runtime version: 6.0.0-rc.2.21480.5


 > For help use argument --help

Using Sqlite database at C:\Users\fmeyer\AppData\Roaming\smtp4dev\database.db

TLS mode: None
SSL/TLS is now disabled by default
To enable use set TlsMode option (values 'ImplicitTls' or 'StartTls') on command line or in appsettings.json and follow the instruction about hostname and certificate trust on first startup.

Application startup exception: System.TypeInitializationException: The type initializer for 'Microsoft.EntityFrameworkCore.EnumerableMethods' threw an exception.
 ---> System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
   at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at Microsoft.EntityFrameworkCore.EnumerableMethods..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.EntityFrameworkCore.EnumerableMethods.get_AnyWithPredicate()
   at Microsoft.EntityFrameworkCore.Query.Internal.AllAnyToContainsRewritingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryTranslationPreprocessor.Process(Expression query)
   at Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1.GetEnumerator()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
   at Rnwood.Smtp4dev.Server.Smtp4devServer.Start() in /home/vsts/work/1/s/Rnwood.Smtp4dev/Server/Smtp4devServer.cs:line 429
   at Rnwood.Smtp4dev.Startup.<>c__DisplayClass5_0.<Configure>b__0(IApplicationBuilder subdir) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 134
   at Rnwood.Smtp4dev.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory log) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 148
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app)
   at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
   at Microsoft.AspNetCore.Hosting.WebHost.BuildApplication()
crit: Microsoft.AspNetCore.Hosting.Diagnostics[6]
      Application startup exception
      System.TypeInitializationException: The type initializer for 'Microsoft.EntityFrameworkCore.EnumerableMethods' threw an exception.
       ---> System.InvalidOperationException: Sequence contains more than one matching element
         at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
         at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
         at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
         at Microsoft.EntityFrameworkCore.EnumerableMethods..cctor()
         --- End of inner exception stack trace ---
         at Microsoft.EntityFrameworkCore.EnumerableMethods.get_AnyWithPredicate()
         at Microsoft.EntityFrameworkCore.Query.Internal.AllAnyToContainsRewritingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
         at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
         at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
         at Microsoft.EntityFrameworkCore.Query.QueryTranslationPreprocessor.Process(Expression query)
         at Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
         at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
         at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
         at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.<Execute>b__0()
         at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
         at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
         at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
         at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
         at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1.GetEnumerator()
         at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
         at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
         at Rnwood.Smtp4dev.Server.Smtp4devServer.Start() in /home/vsts/work/1/s/Rnwood.Smtp4dev/Server/Smtp4devServer.cs:line 429
         at Rnwood.Smtp4dev.Startup.<>c__DisplayClass5_0.<Configure>b__0(IApplicationBuilder subdir) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 134
         at Rnwood.Smtp4dev.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory log) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 148
         at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
         at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
         at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
         at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
         at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app)
         at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
         at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
         at Microsoft.AspNetCore.Hosting.WebHost.BuildApplication()
Unhandled exception. System.TypeInitializationException: The type initializer for 'Microsoft.EntityFrameworkCore.EnumerableMethods' threw an exception.
 ---> System.InvalidOperationException: Sequence contains more than one matching element
   at System.Linq.ThrowHelper.ThrowMoreThanOneMatchException()
   at System.Linq.Enumerable.TryGetSingle[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
   at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
   at Microsoft.EntityFrameworkCore.EnumerableMethods..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.EntityFrameworkCore.EnumerableMethods.get_AnyWithPredicate()
   at Microsoft.EntityFrameworkCore.Query.Internal.AllAnyToContainsRewritingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryTranslationPreprocessor.Process(Expression query)
   at Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1.GetEnumerator()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.EnumerableHelpers.ToArray[T](IEnumerable`1 source)
   at Rnwood.Smtp4dev.Server.Smtp4devServer.Start() in /home/vsts/work/1/s/Rnwood.Smtp4dev/Server/Smtp4devServer.cs:line 429
   at Rnwood.Smtp4dev.Startup.<>c__DisplayClass5_0.<Configure>b__0(IApplicationBuilder subdir) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 134
   at Rnwood.Smtp4dev.Startup.Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory log) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Startup.cs:line 148
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.Hosting.ConventionBasedStartup.Configure(IApplicationBuilder app)
   at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
   at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
   at Microsoft.AspNetCore.Hosting.WebHost.BuildApplication()
   at Microsoft.AspNetCore.Hosting.WebHost.StartAsync(CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, String startupMessage)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, String startupMessage)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token)
   at Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host)
   at Rnwood.Smtp4dev.Program.Main(String[] args) in /home/vsts/work/1/s/Rnwood.Smtp4dev/Program.cs:line 42

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Reactions:1
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

2reactions
f3commented, Feb 23, 2022

Bump-o number 2. This issue still occurs with v3.1.3.2 when .NET 6.0.200 only is present.

PS C:\temp> smtp4dev --db=""
smtp4dev version 3.1.3.2
https://github.com/rnwood/smtp4dev

.NET Core runtime version: 6.0.2

<kaboom>
...

Installing .NET Core 3.1.22 gets around it.

PS C:\temp> smtp4dev --db=""
smtp4dev version 3.1.3.2
https://github.com/rnwood/smtp4dev

.NET Core runtime version: 3.1.22

 > For help use argument --help

Using in memory database.

TLS mode: None

SMTP Server is listening on port 25.
Keeping last 100 messages and 100 sessions.
...
1reaction
rnwoodcommented, May 14, 2022

@penCsharpener Nice fork! I love how simple Blazor and MudBlazor make the front end.

Contributions and PRs are welcome to this project.

Read more comments on GitHub >

github_iconTop Results From Across the Web

ASP.NET Core updates in .NET 6 Release Candidate 2
To get started with ASP.NET Core in .NET 6 RC2, install the .NET 6 SDK. If you're on Windows using Visual Studio, install...
Read more >
Unable to start process dotnet.exe
I am working in Visual Studio 2015, update 3 and I am using .NET Core RC2. Does anyone have any idea how to...
Read more >
With .NET 6 RC 2 Release, Developers Push Back on C# ...
NET 6 RC 2 Release, Developers Push Back on C# Changes ... significant feedback on those changes, in part because builds started to...
Read more >
The Wine development release 6.0-rc2 is now available.
NET 4.0 app) fails to start with Wine-Mono (System.Windows.Forms.DataVisualization.Charting.Chart.BeginInit method not implemented) 38161 Whispering Willows ...
Read more >
Upgrade Your Existing Projects to .NET7 - ABP Community
In this article, I will share our experiences while upgrading to .NET 7.
Read more >

github_iconTop Related Medium Post

No results found

github_iconTop Related StackOverflow Question

No results found

github_iconTroubleshoot Live Code

Lightrun enables developers to add logs, metrics and snapshots to live code - no restarts or redeploys required.
Start Free

github_iconTop Related Reddit Thread

No results found

github_iconTop Related Hackernoon Post

No results found

github_iconTop Related Tweet

No results found

github_iconTop Related Dev.to Post

No results found

github_iconTop Related Hashnode Post

No results found
Previous page

Server Side Rendering Initial Load Fade Out / In

Next page

Minor documentation errors