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Fix #20856: Serialize Waiting and Evaluating as if null. #21243

Merged
merged 1 commit into from
Jul 31, 2024
Merged

Fix #20856: Serialize Waiting and Evaluating as if null. #21243

merged 1 commit into from
Jul 31, 2024

Commits on Jul 31, 2024

  1. Fix scala#20856: Serialize Waiting and Evaluating as if null. 

    This strategy ensures the "serializability" condition of parallel
programs--not to be confused with the data being `java.io.Serializable`.
Indeed, if thread A is evaluating the lazy val while thread B attempts
to serialize its owner object, there is also an alternative schedule
where thread B serializes the owner object *before* A starts evaluating
the lazy val. Therefore, forcing B to see the non-evaluating state is
correct.
    @sjrd
    sjrd committed Jul 31, 2024
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