When I update from 1.16.4 to 1.21.1 it will generate a trial chambers. Trial chambers can intersect villages and strongholds in superflat
How to reproduce
Create a world that can generate villages and strongholds.
Update any version to 1.21.1.
Find a trial chamber.
You will see a trial chamber.
Note:
Trial chambers can intersect player built structures. Trial Chambers can intersect bedrock. Other structures like Pillager Outposts and Ruin Portals can generate.
Can confirm:
1.21.1 1.21
1.20 1.19 1.18 1.17 1.16.
Linked issues
Comments 2
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I am pretty certain this is an intentional feature, but intersecting bedrock seems like an oversight, not a bug though it is worth noting that in 1.21.1 snapshots trial chambers were able to generate so far down the bottom of a room would have bedrock poking through