Eliot Miranda uploaded a new version of Kernel to project The Trunk:
http://source.squeak.org/trunk/Kernel-eem.619.mcz

==================== Summary ====================

Name: Kernel-eem.619
Author: eem
Time: 15 September 2011, 4:40:07.103 pm
UUID: a213fef5-96b3-421c-a1ca-db9ec0ef8876
Ancestors: Kernel-nice.618

Kernel half of first part of changes to revive ability to
create subclasses of CompiledMethod.  Other half is
Compiler-eem.213.
Bug fix to Compiledmethod class>new so that it creates a
dummy method that has a penultimateLiteral.

=============== Diff against Kernel-nice.618 ===============

Item was added:
+ ----- Method: CompiledMethod class>>methodPropertiesClass (in category 'accessing class hierarchy') -----
+ methodPropertiesClass
+ 	"Answer the class to use to create a method's properties, which can be a poor man's way
+ 	 to add instance variables to subclassses of CompiledMethod.  Subclasses of CompiledMethod
+ 	 should define a corresponding subclass of AdditionalMethodState that adds any instance variables
+ 	 required, and override this method to answer that class."
+ 	self flag: #notYetImplemented.
+ 	^AdditionalMethodState!

Item was changed:
  ----- Method: CompiledMethod class>>new (in category 'instance creation') -----
  new
  	"This will not make a meaningful method, but it could be used
  	to invoke some otherwise useful method in this class."
+ 	^self newMethod: 2 header: 1024!
- 	^ self newMethod: 0 header: 0!

Item was added:
+ ----- Method: CompiledMethodTrailer>>createMethod:class:header: (in category 'creating a method') -----
+ createMethod: numberOfBytesForAllButTrailer class: aCompiledMethodClass header: headerWord 
+ 	| meth |
+ 	encodedData ifNil: [self encode].
+ 	
+ 	meth := aCompiledMethodClass newMethod: numberOfBytesForAllButTrailer + size header: headerWord.
+ 	"copy the encoded trailer data"
+ 	1 to: size do:
+ 		[:i | meth at: meth size - size + i put: (encodedData at: i)].
+ 
+ 	^meth!