** Changed in: mono
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/153303

Title:
  Unhandled exception in gmcs

Status in The Mono .NET development environment:
  Fix Released
Status in “mono” package in Ubuntu:
  Fix Released

Bug description:
  gmcs crashes with attached test-case, Microsoft compiler compiles it,
  the symptom:

  roland@Vista:~/svn/mcs/tests$ /usr/bin/gmcs null-ref.cs
  null-ref.cs(17,17): warning CS0219: The variable `foo' is assigned but its 
value is never used

  Unhandled Exception: System.NullReferenceException: A null value was found 
where an object instance was required.
    at Mono.CSharp.ConstructedType..ctor (System.Type t, 
Mono.CSharp.TypeParameter[] type_params, Location l) [0x00000]
    at Mono.CSharp.TypeContainer.DoResolveType () [0x00000]
    at Mono.CSharp.TypeContainer.ResolveType () [0x00000]
    at Mono.CSharp.TypeContainer.ResolveType () [0x00000]
    at Mono.CSharp.RootScopeInfo.LinkScopes () [0x00000]
    at Mono.CSharp.ToplevelBlock.CompleteContexts (Mono.CSharp.EmitContext ec) 
[0x00000]
    at Mono.CSharp.EmitContext.ResolveTopBlock (Mono.CSharp.EmitContext 
anonymous_method_host, Mono.CSharp.ToplevelBlock block, Mono.CSharp.Parameters 
ip, IMethodData md, System.Boolean& unreachable) [0x00000]
    at Mono.CSharp.EmitContext.EmitTopBlock (IMethodData md, 
Mono.CSharp.ToplevelBlock block) [0x00000]
    at Mono.CSharp.MethodData.Emit (Mono.CSharp.DeclSpace parent) [0x00000]
    at Mono.CSharp.Method.Emit () [0x00000]
    at Mono.CSharp.TypeContainer.EmitType () [0x00000]
    at Mono.CSharp.RootContext.EmitCode () [0x00000]
    at Mono.CSharp.Driver.MainDriver (System.String[] args) [0x00000]
    at Mono.CSharp.Driver.Main (System.String[] args) [0x00000]
  roland@Vista:~/svn/mcs/tests$

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