Resolve WebProxy class cause NullReferenceException in mono runtime

[otakustay]

This is my mono environment:

Mono JIT compiler version 2.10.5 (Debian 2.10.5-1)
Copyright (C) 2002-2011 Novell, Inc, Xamarin, Inc and Contributors. www.mono-project.com
    TLS:           __thread
    SIGSEGV:       altstack
    Notifications: epoll
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    LLVM:          supported, not enabled.
    GC:            Included Boehm (with typed GC and Parallel Mark)

My program targets .NET Framework 4.0 and was written on Windows using Visual Studio 2011, and I was using Ninject.3.0.0.15 provided by NuGet package manager.

And I have program below works well and outputs System.Net.WebProxy

class Program {
    static void Main(string[] args) {
        Console.Write(new WebProxy())
    }
}

This should provide enough evident that I have the System.Net.WebProxy class in mono environment, but code below throws a NullReferenceException:

class Program {
    static void Main(string[] args) {
        IKernel kernel = new StandardKernel();
        kernel.Bind<WebProxy>().ToSelf();
        Console.WriteLine(kernel.Get<WebProxy>());
    }
}

The full stachtrace is:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.get_ParentDefinitionMethodInfo () [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.MethodInfo method, BindingFlags flags) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.PropertyInfo property) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.IsDefined (System.Reflection.PropertyInfo element, System.Type attributeType, Boolean inherit) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.HasAttribute (System.Reflection.MemberInfo member, System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Heuristics.StandardInjectionHeuristic.ShouldInject (System.Reflection.MemberInfo member) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector+<>c__DisplayClass3.<SelectPropertiesForInjection>b__2 (IInjectionHeuristic h) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Any[IInjectionHeuristic] (IEnumerable`1 source, System.Func`2 predicate) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector.<SelectPropertiesForInjection>b__1 (System.Reflection.PropertyInfo p) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateWhereIterator>c__Iterator35`1[System.Reflection.PropertyInfo].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddRange (IEnumerable`1 collection) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector.SelectPropertiesForInjection (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Strategies.PropertyReflectionStrategy.Execute (IPlan plan) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner+<>c__DisplayClass1.<CreateNewPlan>b__0 (IPlanningStrategy s) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map[IPlanningStrategy] (IEnumerable`1 series, System.Action`1 action) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner.CreateNewPlan (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner.GetPlan (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Activation.Providers.StandardProvider.Create (IContext context) [0x00000] in <filename unknown>:0 
  at Ninject.Activation.Context.Resolve () [0x00000] in <filename unknown>:0 
  at Ninject.KernelBase+<>c__DisplayClass10.<Resolve>b__c (IBinding binding) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateSelectIterator>c__Iterator27`2[Ninject.Planning.Bindings.IBinding,System.Object].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateCastIterator>c__Iterator17`1[System.Net.WebProxy].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Single[WebProxy] (IEnumerable`1 source, System.Func`2 predicate, Fallback fallback) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Single[WebProxy] (IEnumerable`1 source) [0x00000] in <filename unknown>:0 
  at Ninject.ResolutionExtensions.Get[WebProxy] (IResolutionRoot root, Ninject.Parameters.IParameter[] parameters) [0x00000] in <filename unknown>:0 
  at PingApp.Schedule.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

I found other class (such as Program class itself) works well with NInject, currently the only exception is System.Net.WebProxy class. Since I didn't see any .ctor calls in the stacktrace, it doesn't seem a problem with constructor selection, so any idea how to solve this problem?

[otakustay]

After a little deeper research, I found this is not a problem of the System.Net.WebProxy class, but a more generic one.

The fact is, whenever I have a class with a public property, the injection fails with a NullReferenceException, here is a really simple example:

public class Test {
    public int MyProperty { get; set; } // Can be any type
}

class Program {
    [STAThread]
    static void Main(string[] args) {
        IKernel kernel = new StandardKernel();
        kernel.Bind<Test>().ToSelf();
        Console.WriteLine(kernel.Get<Test>());
    }
}

This program fails when running with mono, the stacktrace is:

Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.get_ParentDefinitionMethodInfo () [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.MethodInfo method, BindingFlags flags) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.GetParentDefinition (System.Reflection.PropertyInfo property) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.IsDefined (System.Reflection.PropertyInfo element, System.Type attributeType, Boolean inherit) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForMemberInfo.HasAttribute (System.Reflection.MemberInfo member, System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Heuristics.StandardInjectionHeuristic.ShouldInject (System.Reflection.MemberInfo member) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector+<>c__DisplayClass3.<SelectPropertiesForInjection>b__2 (IInjectionHeuristic h) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Any[IInjectionHeuristic] (IEnumerable`1 source, System.Func`2 predicate) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector.<SelectPropertiesForInjection>b__1 (System.Reflection.PropertyInfo p) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateWhereIterator>c__Iterator35`1[System.Reflection.PropertyInfo].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0 
  at System.Collections.Generic.List`1[System.Reflection.PropertyInfo].AddRange (IEnumerable`1 collection) [0x00000] in <filename unknown>:0 
  at Ninject.Selection.Selector.SelectPropertiesForInjection (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Strategies.PropertyReflectionStrategy.Execute (IPlan plan) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner+<>c__DisplayClass1.<CreateNewPlan>b__0 (IPlanningStrategy s) [0x00000] in <filename unknown>:0 
  at Ninject.Infrastructure.Language.ExtensionsForIEnumerableOfT.Map[IPlanningStrategy] (IEnumerable`1 series, System.Action`1 action) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner.CreateNewPlan (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Planning.Planner.GetPlan (System.Type type) [0x00000] in <filename unknown>:0 
  at Ninject.Activation.Providers.StandardProvider.Create (IContext context) [0x00000] in <filename unknown>:0 
  at Ninject.Activation.Context.Resolve () [0x00000] in <filename unknown>:0 
  at Ninject.KernelBase+<>c__DisplayClass10.<Resolve>b__c (IBinding binding) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateSelectIterator>c__Iterator27`2[Ninject.Planning.Bindings.IBinding,System.Object].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable+<CreateCastIterator>c__Iterator17`1[TestCmd.Test].MoveNext () [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Single[Test] (IEnumerable`1 source, System.Func`2 predicate, Fallback fallback) [0x00000] in <filename unknown>:0 
  at System.Linq.Enumerable.Single[Test] (IEnumerable`1 source) [0x00000] in <filename unknown>:0 
  at Ninject.ResolutionExtensions.Get[Test] (IResolutionRoot root, Ninject.Parameters.IParameter[] parameters) [0x00000] in <filename unknown>:0 
  at TestCmd.Program.Main (System.String[] args) [0x00000] in <filename unknown>:0 

So I think this must be a big problem in NInject core, is there any temporary methods to get rid of it?

[remogloor]

Please use the mono build instead of the .net build