[Mono-bugs] [Bug 77008][Nor] Changed - MCS throws NullReferenceException in DeclSpace.LookupType

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Changed by miguel at ximian.com.

http://bugzilla.ximian.com/show_bug.cgi?id=77008

--- shadow/77008	2005-12-15 16:34:59.000000000 -0500
+++ shadow/77008.tmp.27754	2005-12-15 16:41:03.000000000 -0500
@@ -105,6 +105,33 @@
 things should help you narrow something down. You could also recompile
 MCS with a Console.WriteLine in  Mono.CSharp.Enum:Emit () that printed
 Location. This would tell you exactly which enum was causing the problem.
 
 ------- Additional Comments From bmaurer at users.sf.net  2005-12-15 16:34 -------
 Ugh, bugzilla midair collision caused priority to change
+
+------- Additional Comments From miguel at ximian.com  2005-12-15 16:41 -------
+Am inclined to think that if the project built /before/ you fixed a
+bug in the class libraries that your fix on the class libraries is to
+blame.  
+
+Looking at the disassembly for offset 0x122 shows the following code:
+
+0x414febac      cmp    %eax,(%eax)
+0x414febae      call  
+0x414fea88:Mono.CSharp.DeclSpace.LookupType(System.String,Mono.CSharp.Location,System.Boolean)
+
+This code is in decl.cs:
+
+  else if (Parent != null && Parent != RootContext.Tree.Types)
+                 e = Parent.LookupType (name, loc, ignore_cs0104);
+
+So Parent is null, and as you can see it is being tested for that.
+
+There might be a number of explanations for why your code no longer
+builds even after reinstalling.  You might have something else in your
+path, multiple installs or a combination of assorted problems.
+
+I would rebuild from a different user account that has not been
+"customized"
+
+