{{Infobox version
| title = Minecraft 1.12.1-pre1
| edition = Java
| image = 17w31a.png
| image2 = Java Edition 1.12.1-pre1.png
| type = Pre-release
| date = August 2, 2017
| parent = 1.12.1
| clienthash = c1448a29036f20c03557720eb1754feab15e7f5d
| jsonhash = fb7202af7c5d5efd6f81e5db6aa8de04e049bc08
| serverhash = b25c39f4658911169e184f00a24798f6463ded14
| prevparent = 1.12
| prev = 17w31a
| nextparent = 1.12.2
}}<onlyinclude>

'''1.12.1-pre1'''<ref>{{Mcnet|minecraft-snapshot-17w31a|Minecraft Pre-release 1.12.1-pre1|August 2, 2017}}</ref> is the first and only pre-release for [[Java Edition 1.12.1]], which includes minor optimizations and fixes bugs.

== Fixes ==
{{fixes|fixedin=1.12.1 Pre-Release 1|prefix=Minecraft
|;old
|117087|{{cd|Class.getSimpleName}} performance issue with large number of block entities.
|86016|Some Mojang staff not mentioned in <code>credits.txt</code>.
|;dev
|119840|[[Diamond]]s get moved into crafting slots on any chat message.
; Other
* Minor optimizations.
}}</onlyinclude>

== Video == 
Video made by [[slicedlime]]: 
{{yt|-MZrMsR1__o}}

== Trivia ==
* 1.12.1-pre1 was previously removed from the [[Java Edition launcher|launcher]] for some time, but was added back in September 2018.

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.1x}}

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