The bug
The activator rail check is done with the rail block a minecart was on before it was moved. This means if it moves from a normal rail to an activator rail the minecart is not activated in this tick.
How to reproduce
Build a setup as shown in
Place some items in the chest
Put a hopper minecart on the powered / golden rail
Right click the hopper minecart after it reached the end of the track
→ It picked up one item
Code analysis
Based on 1.11.2 decompiled using MCP 9.35 rc1
The method net.minecraft.entity.item.EntityMinecart.onUpdate() tests if the block the minecart was on before it moved is an activator rail. Instead it should probably test the block the minecart is on after it was moved (on rails or derailed).
Attachments
Comments 9
Thank you @unknown. I have set the Confirmation Status to "Confirmed" now since @unknown bascially reported this bug in his comment on MC-65029 and I was able to confirm this.
@@unknown would you like to become the reporter of this report? I am not so active when it comes to updating reports.