It is hard to tell from the stack trace that you provided, and that version of the compiler is fairly old, we have fixed roughly a hundred bugs since that release.
It would be useful if you could try with a new compiler, or isolate a sample test case.
The 20040111 snapshot has the same problem (stack trace below, I'm not sure whether it's identical but it's similar), and since that's the latest debian package to have been created, it's the latest that's easy for me to test.
I'm pretty sure this is a regression - an older version of mcs was able to compile this project without problems. Although it's true that the project itself has changed in that time too, none of the changes seem particularly likely to break the compiler.
Do you have any suggestions as to how I might go about narrowing down the problem? Are there any particular language features that are suggested or ruled out by the stack trace?
I'll have a go myself at tracking it down as well, but I'm dealing with a compilation involving 102 generated source files (created by nrdo, http://savannah.nongnu.org/projects/nrdo) that range in size from 5K to 50K, so it's hard to know where to begin. There are only a few of the files that are truly standalone, but when I tried compiling one of those few by itself, the error didn't occur.
I can send you (or someone else) the full source in private email, but I appreciate that that's not much use...
Thanks in advance for any tips, Stuart.
Unhandled Exception: System.NullReferenceException: A null value was found where an object instance was required
in <0x0020c> Mono.CSharp.Interface:DefineType ()
in <0x00226> Mono.CSharp.DeclSpace:LookupInterfaceOrClass (string,string,bool&)in <0x00285> Mono.CSharp.DeclSpace:FindType (Mono.CSharp.Location,string)
in <0x0011a> Mono.CSharp.MemberAccess:ResolveAsTypeStep (Mono.CSharp.EmitContext)
in <0x00011> Mono.CSharp.Expression:ResolveAsTypeTerminal (Mono.CSharp.EmitContext)
in <0x0005b> Mono.CSharp.DeclSpace:ResolveTypeExpr (Mono.CSharp.Expression,bool,Mono.CSharp.Location)
in <0x004e6> Mono.CSharp.TypeContainer:GetClassBases (bool,Mono.CSharp.TypeExpr&,bool&)
in <0x0022e> Mono.CSharp.TypeContainer:DefineType ()
in <0x00305> Mono.CSharp.RootContext:ResolveTree ()
in <0x00a87> Mono.CSharp.Driver:MainDriver (string[])
in <0x0001a> Mono.CSharp.Driver:Main (string[])
-- Stuart Ballard, Senior Web Developer NetReach, Inc. (215) 283-2300, ext. 126 http://www.netreach.com/
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