Fix #20856: Serialize Waiting and Evaluating as if null.
#21243
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lrytz
approved these changes
Jul 31, 2024
tests/run/i20856.scala
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| byteStream.close() | ||
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| def main(args: Array[String]): Unit = | ||
| val bytes = locally: |
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Hum, no reason. I had blindly copy-pasted the reproduction from the issue. I removed it and added a few ends instead.
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.
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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.