[Ironruby-core] IR SVN 107 changes behavior of'require'(compared to SVN 103)

Peter Bacon Darwin bacondarwin at googlemail.com
Fri May 16 04:51:30 EDT 2008

Yes, in the previous versions, the external projects had the option of a
build configuration which did not have the SIGNED compilation symbol.  This
seems to have disappeared.
The significance of this is that when you try to create the Ruby runtime it
tries to look up the assembly for the language.  If SIGNED is set then it
looks them up with fully named assemblies (and so expects the assembly to be
signed correctly).  Obviously we are not provided with the private key to
sign the assemblies and so the lookup fails.

For some reason the RubyConsole project stills works even with this
compilation symbol set.  But if you create your own app then it fails.  All
you have to do is remove this symbol from the build for the
Microsoft.Scripting project and the program will run.

The runtime bug you reported is a bug somehow, although I am not sure if
there is some other way of creating the Engine that stops multiple engines
from being created.  It seems to me that the engine is looked up using the
language context as a key - in this case a RubyContext object.  If you step
through the code there are two of these objects and they do not have
equivalent HashCodes so that triggers the creation of a new Engine.  Either
the object comparison for these objects needs to be fixed or the use of
multiple RubyContexts needs to be fixed.


-----Original Message-----
From: ironruby-core-bounces at rubyforge.org
[mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Robert Brotherus
Sent: Friday,16 May 16, 2008 08:47
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] IR SVN 107 changes behavior
of'require'(compared to SVN 103)

Robert Brotherus
> If someone can provide instructions on how to compile the simple
program I sent without removing the 
> SIGNED symbols from the libraries, then I can see if I get it working.
The SIGNED symbols appeared 
> somewhere around SVN 103 and broke my program as well but at that time
removing the SIGNED allowed 
> working again (even with the 'require').

I must correct myself: The simple program (attached here again) does COMPILE
against all these IR versions but with IR 103+ that are compiled with the
default "SIGNED" symbol, it fails runtime:

Microsoft.Scripting.Runtime.MissingTypeException: Type 'IronRuby,
Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35,
Ruby.Runtime.RubyContext' is missing or cannot be loaded. --->
System.IO.FileLoadException: Could not load file or assembly 'IronRuby,
Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of
its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040) File name:
'IronRuby, Version=, Culture=neutral,
   at System.Reflection.Assembly._nLoad(AssemblyName fileName, String
codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark&
stackMark, Boolean throwOnFileNotFound, Boolean
   at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef,
Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
   at System.Reflection.Assembly.InternalLoad(String assemblyString,
Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean
   at System.Reflection.Assembly.Load(String assemblyString)
   at Microsoft.Scripting.PlatformAdaptationLayer.LoadAssembly(String
name) in
onLayer.cs:line 125
dLanguageContext() in
mainManager.cs:line 165

   at Microsoft.Scripting.Hosting.ScriptSource.Execute(ScriptScope
scope) in
cs:line 146

   at Program.ExecuteStr(String code) in
C:\DATA\IronRubyTest1\Program.cs:line 49
   at Program.Run() in C:\DATA\IronRubyTest1\Program.cs:line 21
   at Program.Main(String[] args) in
C:\DATA\IronRubyTest1\Program.cs:line 9
Press any key to continue . . .


When SIGNED is turned off, then the programs works correctly at IR 103, but
fails at IR 107+ to the reported earlier
"System.MemberAccessException: uninitialized constant Object::F".  

I have now submitted bug (20167) about this. 

Robert Brotherus
Software architect
Napa Ltd
Email: Robert.Brotherus at napa.fi
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