Fix unlikely but possible race in `WeakValueDictionary` It may happen that value in `valueArray` could have been already collected by the GC but #clearDeadSlots have not yet been called. When this happened, `#at:ifAbsentPut:` returned tombstone rather than updating the dictionary with value from block. This commit fixes this by checking whether `valueArray` contain the tombstone and if so, clearing up the dead slots and restarting the operation. HTH.

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# DO NOT EDIT

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# make uses this file (Makefile) only, if there is no

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# file named "makefile" (lower-case m) in the same directory.

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# My only task is to generate the real makefile and call make again.

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# Thereafter, I am no longer used and needed.

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.PHONY: run

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run: makefile

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	$(MAKE) -f makefile

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#only needed for the definition of $(TOP)

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include Make.proto

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makefile: mf

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mf:

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	$(TOP)/rules/stmkmf