Eliot Miranda uploaded a new version of Collections to project The Trunk:
http://source.squeak.org/trunk/Collections-eem.905.mcz

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

Name: Collections-eem.905
Author: eem
Time: 31 July 2020, 8:12:16.99079 pm
UUID: 41110ea1-5c9c-40e4-b5fa-156999451cae
Ancestors: Collections-eem.904

Provide SequenceableCollection>>indicesOfSubCollection:[startingAt:]
Add primitiveFetchMourner for ephemerons.
Tidy up restartFinalizationProcess and name the finalization process for the process inspector.

=============== Diff against Collections-eem.904 ===============

Item was added:
+ ----- Method: SequenceableCollection>>indicesOfSubCollection: (in category 'accessing') -----
+ indicesOfSubCollection: subCollection
+ 	"Answer an Array (possibly empty) of all the indices of subCollection in the receiver."
+ 
+ 	^self indicesOfSubCollection: subCollection startingAt: 1!

Item was added:
+ ----- Method: SequenceableCollection>>indicesOfSubCollection:startingAt: (in category 'accessing') -----
+ indicesOfSubCollection: subCollection startingAt: initialIndex
+ 	"Answer an Array (possibly empty) of all the indices of subCollection in the receiver starting at
+ 	 initialIndex. N.B. This does not (yet) use Boyer-Moore to skip over unnecessary alignments."
+ 
+ 	^Array streamContents:
+ 		[:s| | index |
+ 		 index := initialIndex - 1.
+ 		 [(index := self indexOfSubCollection: subCollection startingAt: index + 1) = 0] whileFalse:
+ 			[s nextPut: index]]!

Item was added:
+ ----- Method: WeakArray class>>primitiveFetchMourner (in category 'private') -----
+ primitiveFetchMourner
+ 	"Answer the next mourner in the VM's queue of objects to be finalized.
+ 	 The queue contains weak arrays and ephemerons.  If the primitive is
+ 	 not implemented, raise an error telling people to upgrade the VM.  If
+ 	 implemented, the primitive fails if the queue is empty, with the error
+ 	 code #'not found'. Primitive.  Essential."
+ 
+ 	<primitive: 172 error: ec>
+ 	ec ifNil: [^self error: 'The primitiveFetchMourner primitive is missing.\Please upgrade your virtual machine to one that has the primitive.' withCRs].
+ 	^nil!

Item was changed:
  ----- Method: WeakArray class>>restartFinalizationProcess (in category 'private') -----
  restartFinalizationProcess
  	"kill any old process, just in case"
+ 	FinalizationProcess ifNotNil:
+ 		[FinalizationProcess terminate.
+ 		 FinalizationProcess := nil].
- 	FinalizationProcess
- 		ifNotNil: [FinalizationProcess terminate.
- 			FinalizationProcess := nil].
  
  	FinalizationSemaphore := Smalltalk specialObjectsArray at: 42.
  	FinalizationDependents ifNil: [FinalizationDependents := WeakArray new: 10].
  	FinalizationLock := Semaphore forMutualExclusion.
  	FinalizationProcess := [self finalizationProcess]
+ 								forkAt: Processor userInterruptPriority + 1
+ 								named: 'the finalization process'!
- 		forkAt: Processor userInterruptPriority!