Some villagers have Career that their Profession doesn't allow (e.g. a Butcher with Career 3 or 4). This can be found using /entitydata.
These villagers have trades from other random professions, but according their Career (e.g. a Librarian with Career:3 can have Tool Smith's or Shepherd's trades). If Profession of the affected villager allows multiple Careers, then it's name is displayed as a "Villager".
Old description:
While exploring the new 1.11 snapshot. I was observing villagers and any changes including the "nitwit." While in a Butcher villager's GUI, instead of displaying "Butcher" it displayed "Villager." I found other "Butcher" villagers and they displayed the name properly. I attempted to replicate the glitch by spawning in more villagers, but I could not. The villager occurred in a naturally spawned village. The coordinates are -500, 70, -700. The seed is: -7989118705340891292
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Comments 13
I didn't find the "Butcher" displaying "Villager", with provided seed and coordinates (may have missed one). But I did find Librarian trading string and Armorer trading wheat as well.
@unknown, find the house from the screenshot.
Upd. Careers (differeent versions of villagers of the same colored) are set randomly, not depending on the seed. So, you probably should generate the world multiple times and seek for any other villagers of that colour.
The affected villager had it's career set to 4, while the butcher only has 2 careers: a butcher (1) itself and a leatherworker (2). You can't get it via /summon (it defaults to 1), but you can change it using /entitydata. If you do so, you get a villager "Villager", same as the one in the description.
I only reported what I found incorrect. I looked around the village after recreating the seed several times and found a cleric with two trades, one for wool and the other for shears. I also found the villager with the GUI title "Villager" again.
I am not sure I am following everything correctly, but
@Suncat do you want me or the original reporter to open a new ticket for the wrong Tier 1 trades?
@FVbico huh???
I must have missed the ticket about no trades; I am going to assume that since FVbico reported it, I don't need to comment there
-@unknown, you have the issue - you make the ticket.- Don't need to do it. I'm going to change this ticket after a few tests
Lol too late - I just did it - MC-106362
next time I'll keep my curiousity in check lol
Please, add the seed and coordinates of the village