For 3.6-g2
If trying to save a method with an unknown identifier in a class with a
new SharedPool as a poolDictionary an error will occur. This changeset
adds an additional method to SharedPool to prohibit this.

Example to reproduce such an error:
 
ZipArchiveMember
crc32
	Xyz.
	^crc32
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/x-gzip
Size: 424 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20031002/c3dd85a3/attachment.bin