Error: Bad IL format. Please support .NET Core 3.0, 3.1

[CRC32EX]

Steps to reproduce this issue

1. Write code

// Program.cs
using System;
using ZeroFormatter;

namespace ZeroFormatterTest
{
  [ZeroFormattable]
  public class MyClass
  {
    [Index(0)]
    public virtual int Age { get; set; }
  }

  class Program
  {
    static void Main(string[] args)
    {
      var mc = new MyClass { Age = 1 };
      ZeroFormatterSerializer.Serialize(mc);
    }
  }
}

2. Execute

$ dotnet run
Unhandled exception. System.BadImageFormatException: Bad IL format.
  at ZeroFormatter.DynamicObjectSegments.ZeroFormatter_Formatters_DefaultResolver.ZeroFormatterTest.MyClass$Formatter.Serialize(Byte[]& , Int32 , MyClass )
  at ZeroFormatter.ZeroFormatterSerializer.CustomSerializer`1.Serialize[T](Byte[]& buffer, Int32 offset, T obj)
  at ZeroFormatter.ZeroFormatterSerializer.CustomSerializer`1.Serialize[T](T obj)
  at ZeroFormatter.ZeroFormatterSerializer.Serialize[T](T obj)
  at ZeroFormatterTest.Program.Main(String[] args) in C:\Programs\VC\ZeroFormatterTest\ZeroFormatterTest\Program.cs:line 20

Possible solution

• use .NET Core 2.2, instead of .NET Core 3.0
• use .NET Core 2.2, instead of .NET Core 3.1

Environment

• Windows 10 64bit 1903 (Build 18362.30)
• .NET Core 3.0.100
• .NET Core 3.1.100
• ZeroFormatter 1.6.4
• Visual Studio Community 2019

[btogkas]

In order to fix this you will need to change
DynamicFormatter.cs
private static void CreateSerialize(Type elementType, ....formattersInField)

....
// if(segment != null)
...
il.Emit(OpCodes.Call, typeof(IZeroFormatterSegment).GetTypeInfo().GetMethod("Serialize"));

to

il.Emit(OpCodes.Callvirt, typeof(IZeroFormatterSegment).GetTypeInfo().GetMethod("Serialize"));

[enshivam]

+1

[roikra]

Any progress regarding this issue? I am also struggling with it.

[btogkas]

The solution is above. You have to get the code and On DynamicFormatter.cs
you have to change OpCodes.Call to OpCodes.Callvirt on the line i have posted. Unfortunately i have not the right to pr - merge.

[roikra]

Can we open a PR?

[roikra]

CreateSerialize does not exist in CreateSerialize.
Are you referring to the NetCore project?

[truecooler]

CreateSerialize does not exist in CreateSerialize.
Are you referring to the NetCore project?

@roikra
check it out here
works fine with .net core 3

[OvsyannikovAA]

CreateSerialize does not exist in CreateSerialize.
Are you referring to the NetCore project?

@roikra
check it out here
works fine with .net core 3

This solution doesn't work for me.

[OvsyannikovAA]

CreateSerialize does not exist in CreateSerialize.
Are you referring to the NetCore project?

In method:

static TypeInfo BuildFormatter(ModuleBuilder builder, Type resolverType, Type elementType, Tuple<int, EmittableMemberInfo>[] memberInfos)

You must change line:

il.Emit(OpCodes.Call, typeof(IZeroFormatterSegment).GetTypeInfo().GetMethod("Serialize"));

To:

il.Emit(OpCodes.Callvirt, typeof(IZeroFormatterSegment).GetTypeInfo().GetMethod("Serialize"));

[balendra-singh]

@btogkas The above solution works if the above changes are done on both the projects

1. ZeroFormatter
2. ZeroFormatter.NETCore

Cheers!

[CRC32EX]

This issue was resolved.
Install this package.

Install-Package Alexinea.ZeroFormatter

https://github.com/alexinea/Alexinea.ZeroFormatter/

[romeshniriella]

This issue was resolved.
Install this package.

Install-Package Alexinea.ZeroFormatter

https://github.com/alexinea/Alexinea.ZeroFormatter/

Lifesaver! Thank you.

[perennialmind]

This issue was resolved.
Install this package.

Install-Package Alexinea.ZeroFormatter

https://github.com/alexinea/Alexinea.ZeroFormatter/

Lifesaver! Thank you.

It looks like that fork changed the wire format of DateTime from (seconds,nanos) to (ticks) - without updating any docs.
master...alexinea:master#diff-e09fd40df61d89d615fe9be86f2da4ed8ec5d79e04e7b57cb0b92265bc838525L581