Problems with Mutex and ConditionVariable under IronRuby

debug_output.txt

WEAK_TABLE: IronRuby.Runtime.WeakTable`2[[System.Object, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[IronRuby.Runtime.RubyInstanceData, IronRuby, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]
UPDATED: Object                                             SetMixins                      affected=7     total=1    
UPDATED: Object                                             CreateInstanceSingleton        affected=38    total=2    
UPDATED: Object                                             CreateInstanceSingleton        affected=40    total=3    
INITED: File
INITED: File::Constants
INITED: IO
INITED: Kernel
INITED: Object
INITED: Process
INITED: Errno
UPDATED: Object                                             CreateInstanceSingleton        affected=188   total=4    
INITED: <anonymous>
LOAD_COMPILED: 1: C:/Sviluppo/ironruby/SVN/trunk/lib/IronRuby\thread.rb
LOADER: Loading assembly 'IronRuby.Libraries' and type 'IronRuby.StandardLibrary.Threading.ThreadingLibraryInitializer'
INITED: <anonymous>
INITED: Class
INITED: Module
UPDATED: Class                                              UndefineMethodNoEvent          affected=84    total=5    
INITED: <anonymous>
INITED: <anonymous>
UPDATED: Class                                              UndefineMethodNoEvent          affected=84    total=6    
UPDATED: Class                                              UndefineMethodNoEvent          affected=84    total=7    
INITED: <anonymous>
INITED: <anonymous>
INITED: Mutex
INITED: <anonymous>
INITED: ConditionVariable
INITED: <anonymous>
INITED: Thread
A first chance exception of type 'System.Threading.SynchronizationLockException' occurred in mscorlib.dll
THREAD: Object synchronization method was called from an unsynchronized block of code.

   in System.Threading.Monitor.ObjPulse(Object obj)
   in System.Threading.Monitor.Pulse(Object obj)
   in IronRuby.StandardLibrary.Threading.RubyConditionVariable.Signal(RubyConditionVariable self) in C:\Sviluppo\ironruby\SVN\trunk\src\IronRuby.Libraries\Thread\RubyConditionVariable.cs:riga 32
   in _stub_$26(Closure , CallSite , RubyBlockScope , Object )
   in System.Dynamic.UpdateDelegates.UpdateAndExecute2[T0,T1,TRet](CallSite site, T0 arg0, T1 arg1) in C:\Sviluppo\ironruby\SVN\trunk\src\Microsoft.Scripting.Core\Actions\UpdateDelegates.Generated.cs:riga 343
   in ;T002.rb;16$5(Closure , BlockParam , Object )
   in IronRuby.Runtime.Calls.BlockDispatcher0.Invoke(BlockParam param, Object self) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\Calls\BlockDispatchers.cs:riga 40
   in IronRuby.Runtime.RubyOps.Yield0(Object self, BlockParam blockParam) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\RubyOps.cs:riga 294
   in IronRuby.Runtime.BlockParam.Yield(Object& blockResult) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\BlockParam.cs:riga 135
   in IronRuby.StandardLibrary.Threading.RubyMutex.Synchronize(BlockParam criticalSection, RubyMutex self) in C:\Sviluppo\ironruby\SVN\trunk\src\IronRuby.Libraries\Thread\RubyMutex.cs:riga 70
   in _stub_$22(Closure , CallSite , RubyBlockScope , Object , Proc )
   in System.Dynamic.UpdateDelegates.UpdateAndExecute3[T0,T1,T2,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2) in C:\Sviluppo\ironruby\SVN\trunk\src\Microsoft.Scripting.Core\Actions\UpdateDelegates.Generated.cs:riga 461
   in ;T002.rb;15$4(Closure , BlockParam , Object )
   in IronRuby.Runtime.Calls.BlockDispatcher0.Invoke(BlockParam param, Object self) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\Calls\BlockDispatchers.cs:riga 40
   in IronRuby.Runtime.RubyOps.Yield0(Object self, BlockParam blockParam) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\RubyOps.cs:riga 294
   in IronRuby.Runtime.BlockParam.Yield(Object[] args, Object& blockResult) in C:\Sviluppo\ironruby\SVN\trunk\src\ironruby\Runtime\BlockParam.cs:riga 157
   in IronRuby.Builtins.ThreadOps.<>c__DisplayClass1.<CreateThread>b__0() in C:\Sviluppo\ironruby\SVN\trunk\src\IronRuby.Libraries\Builtins\ThreadOps.cs:riga 419

mscorlib:0:in `ObjPulse'mscorlib:0:in `Pulse'C:\Sviluppo\ironruby\SVN\trunk\src\IronRuby.Libraries\Thread\RubyConditionVariable.cs:32:in `signal'T002.rb:16C:\Sviluppo\ironruby\SVN\trunk\src\IronRuby.Libraries\Thread\RubyMutex.cs:70:in `synchronize'T002.rb:15mscorlib:0:in `Run'mscorlib:0:in `ThreadStart'

T002.rb

# code taken from http://www.rubycentral.com/pickaxe/tut_threads.html#UF

require 'thread'
mutex = Mutex.new
cv = ConditionVariable.new

a = Thread.new {
  mutex.synchronize {
    puts "A: I have critical section, but will wait for cv"
    cv.wait(mutex)
    puts "A: I have critical section again! I rule!"
  }
}

puts "(Later, back at the ranch...)"

b = Thread.new {
  mutex.synchronize {
    puts "B: Now I am critical, but am done with cv"
    cv.signal
    puts "B: I am still critical, finishing up"
  }
}
a.join
b.join