[Mono-bugs] [Bug 703027] New: Tuple equality with null values

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https://bugzilla.novell.com/show_bug.cgi?id=703027

https://bugzilla.novell.com/show_bug.cgi?id=703027#c0


           Summary: Tuple equality with null values
    Classification: Mono
           Product: Mono: Runtime
           Version: 2.10.x
          Platform: x86
        OS/Version: Ubuntu
            Status: NEW
          Severity: Major
          Priority: P5 - None
         Component: misc
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: laurentlb at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1;
Trident/5.0)

Input file:

  var a = new Tuple<int, Object>(2, null);
  var b = new Tuple<int, Object>(2, null);
  Console.WriteLine(a.Equals(b));


Reproducible: Always

Actual Results:  
Result on Mono 2.10:

Unhandled Exception: System.ArgumentException: Argument is not compatible
Parameter name: x
  at
System.Collections.Generic.EqualityComparer`1[System.Object].System.Collections.IEqualityComparer.Equals
(System.Object x, System.Object y) [0x00000] in <filename unknown>:0 
  at
System.Tuple`2[System.Int32,System.Object].System.Collections.IStructuralEquatable.Equals
(System.Object other, IEqualityComparer comparer) [0x00000] in <filename
unknown>:0 
  at System.Tuple`2[System.Int32,System.Object].Equals (System.Object obj)
[0x00000] in <filename unknown>:0 
  at Test.Main () [0x00000] in <filename unknown>:0 

Expected Results:  
Expected (what I get on MS .NET):

True

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