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Declaration referenced in a method implementation cannot be a final method. With VS 2022 preview 4

See original GitHub issue

I’m getting Declaration referenced in a method implementation cannot be a final method when querying a database using EFCore.pg in a fresh Blazor project in VS 2022 preview 4.

fail: Microsoft.EntityFrameworkCore.Database.Connection[20004]
      An error occurred using the connection to database 'WebService' on server ''.
fail: Microsoft.EntityFrameworkCore.Query[10100]
      An exception occurred while iterating over the results of a query for context type 'Dream.Webservice.Server.Models.WebserviceContext'.
      System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method.  Type: 'Npgsql.NpgsqlBatchCommandCollection'.  Assembly: 'Npgsql, Version=6.0.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7'.
         at Npgsql.PostgresDatabaseInfo.LoadBackendTypes(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
         at Npgsql.PostgresDatabaseInfo.LoadBackendTypes(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.PostgresDatabaseInfo.LoadPostgresInfo(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.PostgresDatabaseInfoFactory.Load(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.Internal.NpgsqlDatabaseInfo.Load(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.Internal.NpgsqlConnector.LoadDatabaseInfo(Boolean forceReload, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.Internal.NpgsqlConnector.Open(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.ConnectorPool.OpenNewConnector(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.ConnectorPool.<Get>g__RentAsync|29_0(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.NpgsqlConnection.<Open>g__OpenAsync|45_0(Boolean async, CancellationToken cancellationToken)
         at Npgsql.NpgsqlConnection.Open()
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternal(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.InitializeReader(Enumerator enumerator)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.<>c.<MoveNext>b__19_0(DbContext _, Enumerator enumerator)
         at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.MoveNext()
      System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method.  Type: 'Npgsql.NpgsqlBatchCommandCollection'.  Assembly: 'Npgsql, Version=6.0.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7'.
         at Npgsql.PostgresDatabaseInfo.LoadBackendTypes(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at System.Runtime.CompilerServices.AsyncMethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
         at Npgsql.PostgresDatabaseInfo.LoadBackendTypes(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.PostgresDatabaseInfo.LoadPostgresInfo(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.PostgresDatabaseInfoFactory.Load(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.Internal.NpgsqlDatabaseInfo.Load(NpgsqlConnector conn, NpgsqlTimeout timeout, Boolean async)
         at Npgsql.Internal.NpgsqlConnector.LoadDatabaseInfo(Boolean forceReload, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.Internal.NpgsqlConnector.Open(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.ConnectorPool.OpenNewConnector(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.ConnectorPool.<Get>g__RentAsync|29_0(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
         at Npgsql.NpgsqlConnection.<Open>g__OpenAsync|45_0(Boolean async, CancellationToken cancellationToken)
         at Npgsql.NpgsqlConnection.Open()
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternal(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
         at Microsoft.EntityFrameworkCore.Storage.RelationalCommand.ExecuteReader(RelationalCommandParameterObject parameterObject)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.InitializeReader(Enumerator enumerator)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.<>c.<MoveNext>b__19_0(DbContext _, Enumerator enumerator)
         at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.Enumerator.MoveNext()

Runtime info:

VS 2022 preview 4
.Net core 6.0.0 preview 7

Package versions:

Npgsql.EntityFrameworkCore.PostgreSQL - 6.0.0-preview7
Microsoft.AspNetCore.Components.WebAssembly.Server - 6.0.0-rc.1.21452.15

I also noticed that no matter how I change the connection string, the server is always empty in the An error occurred using the connection to database 'WebService' on server ''. message.

Issue Analytics

State:
Created 2 years ago
Comments:9 (5 by maintainers)

Top GitHub Comments

3reactions

rojicommented, Sep 15, 2021

@papaja please read issue #3935 which I linked to above. You will have to wait for the Npgsql rc1 release.

3reactions

kislovscommented, Sep 15, 2021

@roji, hello! How soon is it expected to npgsql.* RC1 packages to be published? 🙂

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