[Mono-bugs] [Bug 620864] New: NullReferenceException serializing a dictionary

[bugzilla_noreply at novell.com]

http://bugzilla.novell.com/show_bug.cgi?id=620864

http://bugzilla.novell.com/show_bug.cgi?id=620864#c0


           Summary: NullReferenceException serializing a dictionary
    Classification: Mono
           Product: Mono: Runtime
           Version: SVN
          Platform: 64bit
        OS/Version: RHEL 5
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: srfcanada at hotmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; WOW64;
Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; MS-RTC LM 8)

In the following sample, serializing some basic dictionaries will generate
NullReferenceExceptions on mono but work ok on windows. Its seems to be just
dictionaries but it could be others.

1. compile the following test:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;

public class TestProject
{



   static void Main(string[] args)
   {
      //fails on mono
      IDictionary<string, Type> myDataA = new Dictionary<string, Type>();
      myDataA.Add("test1", typeof(String));
      MemoryStream memoryStream = new MemoryStream();
      BinaryFormatter binaryFormatter = new BinaryFormatter();
      binaryFormatter.Serialize(memoryStream, myDataA);

      //fails on mono too
      IDictionary<string, object> myData = new Dictionary<string, object>();
      myData.Add("test1", 1234);
      myData.Add("test2", "myString");
      memoryStream = new MemoryStream();
      binaryFormatter = new BinaryFormatter();
      binaryFormatter.Serialize(memoryStream, myData);
   }

}


2. running it on mono will generate this error but works on windows:
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
  at System.ValueType.GetHashCode () [0x00000] in <filename unknown>:0
  at System.Collections.Hashtable.GetHash (System.Object key) [0x00000] in
<filename unknown>:0
  at System.Collections.Hashtable.Find (System.Object key) [0x00000] in
<filename unknown>:0
  at System.Collections.Hashtable.Contains (System.Object key) [0x00000] in
<filename unknown>:0
  at System.Runtime.Serialization.SerializationObjectManager.RegisterObject
(System.Object obj) [0x00000] in <filename unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.GetObjectData
(System.Object obj,
System.Runtime.Serialization.Formatters.Binary.TypeMetadata& metadata,
System.Object& data) [0x00000] in <filename unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObject
(System.IO.BinaryWriter writer, Int64 id, System.Object obj) [0x00000] in
<filename unknown>:0
  at
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectInstance
(System.IO.BinaryWriter writer, System.Object obj, Boolean isValueObject)
[0x00000] in <filename unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteValue
(System.IO.BinaryWriter writer, System.Type valueType, System.Object val)
[0x00000] in <filename unknown>:0
  at
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteGenericArray
(System.IO.BinaryWriter writer, Int64 id, System.Array array) [0x00000] in
<filename unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteArray
(System.IO.BinaryWriter writer, Int64 id, System.Array array) [0x00000] in
<filename unknown>:0
  at
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectInstance
(System.IO.BinaryWriter writer, System.Object obj, Boolean isValueObject)
[0x00000] in <filename unknown>:0
  at
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteQueuedObjects
(System.IO.BinaryWriter writer) [0x00000] in <filename unknown>:0
  at
System.Runtime.Serialization.Formatters.Binary.ObjectWriter.WriteObjectGraph
(System.IO.BinaryWriter writer, System.Object obj,
System.Runtime.Remoting.Messaging.Header[] headers) [0x00000] in <filename
unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize
(System.IO.Stream serializationStream, System.Object graph,
System.Runtime.Remoting.Messaging.Header[] headers) [0x00000] in <filename
unknown>:0
  at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize
(System.IO.Stream serializationStream, System.Object graph) [0x00000] in
<filename unknown>:0
  at TestProject.Main (System.String[] args) [0x00000] in <filename unknown>:0


Reproducible: Always

Steps to Reproduce:
1.
2.
3.

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