Why is UndefinedObject version of "did not understand" so different from
others?
It also inverts the object message paradigm.
Thanks
Aik-Siong Koh
description
"Returns a textual description of the exception (based on the
message instance variable). If message is nil, it returns the
defaultDescription instead."
message ifNil: [ ^ self defaultDescription ].
message lookupClass == UndefinedObject ifTrue: [
^ message selector printString , ' was sent to nil' ].
^ 'Instance of ' , message lookupClass printString
, ' did not understand ' , message selector printString
