In 60445, browse the implementors of #cacheAt:for:ifAbsentPut:
and the view the Versions of each.��

Curiously some of them have a blank user/date.

There are others...
�� �� errors := OrderedCollection new.

�� �� versions := (CompiledMethod allInstances) flatCollect: [:cm|��

[VersionBrowser new setRGMethodFrom: cm asRingDefinition; buildChangeList]��

on: Error do:[:ex| errors add: (cm -> ex). #()] ].

�� �� versions size.��

"112131"

�� �� emptyStamps := versions select: [:rgm| rgm stamp = ''].

�� �� emptyStamps size.��

"9264"

or 8%

Maybe some are historic, but I'd guess this one at least is not so old...��

GLMFastListDataSource>>cacheAt:for:ifAbsentPut:

What reasonable action do we need to take?

cheers -ben