v3.4.12

Reactor-Core 3.4.12 is part of 2020.0.13 Release Train (Europium SR13).

This service release contains improvement to tracebacks rendering, introduces a couple utility methods to Logger and bring bugfixes.

All changes from 3.3.22.RELEASE are also included and these are listed below with an additional level of indentation.

✨ New features and improvements

• Tune OnAssemblyException.toString for better traceback rendering (#2814)
• Improve traceback rendering of checkpoints (#2820)
• Add logging convenience methods, polish a few messages (#2823)

🐞 Bug fixes

• Fix FluxSwitchMapNoPrefetch inner's scan(CANCELLED) (#2809)
• Fix initialization order of Loggers factory (#2824)
• Make OnAssemblyException serializable again (#2833)

📖 Documentation, Tests and Build

• Fix Signal#isOnComplete javadoc (#2817)
• Fix flatMapMany description typo (#2834)
• from 3.3.x:
  • Use @NonNull annotation, not JetBrain's NotNull (#2808)
  • [agent] Bump OpCode to ASM9 for compatibility with newer JDKs (#2825)
  • Use gradle-build-action for invoking Gradle on CI (#2828 )

👍 Thanks to all contributors who participated to this release

@dominikbrandon, @lhauspie, @boroborome, @bigdaz, @trettstadtnlb, @EMellau