Paper
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PaperMC
BlockPistonExtendEvent doesn't fire when nothing is pushed
Expected behavior
BlockPistonExtendEvent should fire when a piston is activated even if nothing is pushed.
Observed/Actual behavior
The event does not fire when the piston pushes no blocks.
Steps/models to reproduce
Listen for BlockPistonExtendEvent, trigger a piston which is set up to push air & observe nothing even though the piston clearly fires. The event doesn't fire when blocks aren't pushed.
Plugin and Datapack List
No datapacks & no other plugins.
Paper version
Paper version git-Paper-485 (MC: 1.20.4) (Implementing API version 1.20.4-R0.1-SNAPSHOT) (Git: https://github.com/PaperMC/Paper/commit/862299b6a6588ff60db69dbc40e8514f9690d318)
Other
When looking at the paper documentation the described behavior for BlockPistonExtendEvent is "Called when a piston extends" which doesn't seem to be the case if nothing is pushed. BlockPistonRetractEvent has the same issue.
Expected behavior would be for getBlocks() to return empty instead of the event not firing at all.
It's possible this PR fixes the issue, but I haven't tested that exactly yet. https://github.com/PaperMC/Paper/pull/9258
