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fixes #13881

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* fixes #13881
* documented changed requirements for system.onThreadDestruction
* destructors.rst: update the documentation
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Andreas Rumpf 2020-05-12 15:46:24 +02:00 • committed by GitHub
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@ -89,6 +89,9 @@
- Fix a bug where calling `close` on io streams in osproc.startProcess was a noop and led to
hangs if a process had both reads from stdin and writes (eg to stdout).
- The callback that is passed to `system.onThreadDestruction` must now be `.raises: []`.
## Language changes
- In the newruntime it is now allowed to assign discriminator field without restrictions as long as case object doesn't have custom destructor. Discriminator value doesn't have to be a constant either. If you have custom destructor for case object and you do want to freely assign discriminator fields, it is recommended to refactor object into 2 objects like this: