[Mono-bugs] [Bug 417838] New: NRE while importing type

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=417838


           Summary: NRE while importing type
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Cecil
        AssignedTo: jbevain at novell.com
        ReportedBy: rkvinge at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


Repro:

using System;
using Mono.Cecil;

class C {
static void Main ()
{
        AssemblyDefinition a;
        AssemblyDefinition corlib =
AssemblyFactory.GetAssembly(typeof(int).Assembly.Location);
        TypeReference ienumerable;
        TypeDefinition list;
        GenericInstanceType generic;

        list = corlib.MainModule.Types ["System.Collections.Generic.List`1"];
        ienumerable = list.Interfaces [2];

        generic = new GenericInstanceType(ienumerable);
        generic.GenericArguments.Add (list.GenericParameters [0]);
//Console.WriteLine (ienumerable.FullName);

        a = Mono.Cecil.AssemblyFactory.DefineAssembly("test",
AssemblyKind.Dll);
        a.MainModule.Import(generic);
}
}

Result:
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
  at Mono.Cecil.DefaultImporter.GetGenericParameter
(Mono.Cecil.GenericParameter gp, Mono.Cecil.ImportContext context) [0x00010] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:120 
  at Mono.Cecil.DefaultImporter.ImportTypeReference (Mono.Cecil.TypeReference
t, Mono.Cecil.ImportContext context) [0x00037] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:138 
  at Mono.Cecil.DefaultImporter.GetTypeSpec (Mono.Cecil.TypeSpecification
original, Mono.Cecil.ImportContext context) [0x000a8] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:86 
  at Mono.Cecil.DefaultImporter.ImportTypeReference (Mono.Cecil.TypeReference
t, Mono.Cecil.ImportContext context) [0x0001e] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:135 
  at Mono.Cecil.DefaultImporter.GetTypeSpec (Mono.Cecil.TypeSpecification
original, Mono.Cecil.ImportContext context) [0x00000] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:73 
  at Mono.Cecil.DefaultImporter.ImportTypeReference (Mono.Cecil.TypeReference
t, Mono.Cecil.ImportContext context) [0x0001e] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/DefaultImporter.cs:135 
  at Mono.Cecil.ModuleDefinition.Import (Mono.Cecil.TypeReference type)
[0x00011] in
/mono/main/src/mcs/class/Mono.Cecil/Mono.Cecil/ModuleDefinition.cs:281 
  at C.Main () [0x00074] in /home/rolf/test/cecil-3.cs:26 



I'm not sure if I'm doing something bad with Cecil though, but in any case I
shouldn't get a NRE.


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