Found it! it's up in the corner–same map as on the snapshot phase version. I'm playing on a version of this world that I backed up, in case you're wondering.
All right, so the directional thing wasn't a problem. (My seed setup always mixes me up, but that's not a bug--just my human experience with the game. 🙂 ) But, I'm showing some screenshots here that show the map as well as where it's pointing the mansion to, but it's not there. I had a map like this on an earlier version of this world where I was playtesting snapshots and it led me to a similar location where there was no pointer at all, but I did find the mansion on the north side almost off the map. I will go explore there to see if I can find it. If I do, I'll also post a screenshot of that.
Confirmed in 1.8.9
Confirmed in 1.8.5
I believe currently, each piston separately computes the number of blocks to push. So, in your example, Minecraft doesn't see it as two pistons trying to push 7 blocks each - it sees it as two pistons each trying to push 14 blocks.
Aaron1011's log output.
I've attached it.
I ran the command from a command block, and the 'Saving and pausing gam..' is just due to me hitting Escape (which paused the game) after running the command.
I can reproduce this with snapshot 14w10c on OS X 10.9. It occurs whenever the command is executed, using a command block or having a player execute it manually. This also occurs with the fireworksSpark particle.
I suspect the particles are being created in a blocking fashion, as the amount of time the game freezes is proportionate to the number of particles specified.
I think you meant to say "Iron Trapdoor" instead of "Iron Pressureplate"
467491214708786261
Originated in 1.17.1
I got the map from hiring a villager at a village about 3000 blocks south of spawn
If you upgrade the chunks to 1.18, though, it should load in and you can ask or hire any cartographer fairly close to spawn. It's the closest mansion in 1.18, but actually the third one I visited in this world.