The Bug:
Iron golems summoned by villagers can spawn on brittle ice.
When panicking villagers summon an iron golem, the game refuses to spawn the iron golem on a short list of blocks such as glass, leaves, ice and frosted ice. Brittle ice is not on that list, therefore making it a valid block that iron golems can spawn on. Considering that ice and frosted ice are part of that list, I think brittle ice should also be included.
Steps to Reproduce:
Summon a large area of brittle ice by using the command provided below.
/fill ~-50 ~-1 ~-50 ~50 ~-1 ~50 minecraft:brittle_iceBuild an enclosed area in the middle of the ice.
Place multiple beds and summon multiple villagers.
Summon a zombie near the villagers so that they start panicking.
Wait until an iron golem spawns on the brittle ice.
Observed Behavior:
Iron golems can spawn on brittle ice.
Expected Behavior:
Iron golems would not be able to spawn on brittle ice. They cannot spawn on ice or frosted ice, so they shouldn’t be able to spawn on brittle ice either.