Datapack Codex

Java Edition 1.12.1-pre1

Minecraft Wiki article. Categories: Java_Edition_development_versions_with_vulnerabilities, Java_Edition_versions, Java_Edition_1.12.1_pre-releases, Java_Edition_pre-releases_released_in_2017, Java_Edition_pre-releases, Pages_with_YouTube_videos

📌 Mirrored from Minecraft Wiki

This article is reproduced from Java Edition 1.12.1-pre1 on the Minecraft Wiki. Mirrored from revision 3536607. It is licensed CC BY-NC-SA 3.0 by the Minecraft Wiki contributors — not under the Codex’s CC BY-SA 4.0, and it may not be used commercially. Edits belong upstream, not here.

On this page
This page covers a development version that has a major issue under certain conditions.
 
The dedicated server for this version has a security vulnerability in the Log4j library that could be used to perform a remote code execution exploit. It can be addressed by appending a certain JVM argument to the server startup command line.[1]
Minecraft 1.12.1-pre1
17w31a.png: Infobox image for Minecraft version 'Minecraft 1.12.1-pre1'
Java Edition 1.12.1-pre1.png: Infobox image for Minecraft version 'Minecraft 1.12.1-pre1'
{
    "title": "Minecraft 1.12.1-pre1",
    "images": [
        "17w31a.png",
        "Java Edition 1.12.1-pre1.png"
    ],
    "rows": [
        {
            "field": "''(link to Java Edition article, displayed as Java Edition)''",
            "label": "(link to Edition article, displayed as Edition)"
        },
        {
            "field": "August 2, 2017",
            "label": "Release date"
        },
        {
            "field": "(link to Pre-release article, displayed as Pre-release)",
            "label": "(link to Version types article, displayed as Type)"
        },
        {
            "field": "(link to Java Edition 1.12.1 article, displayed as 1.12.1)",
            "label": "Pre-release for"
        },
        {
            "field": "[https://piston-data.mojang.com/v1/objects/c1448a29036f20c03557720eb1754feab15e7f5d/client.jar Client] ([https://piston-meta.mojang.com/v1/packages/fb7202af7c5d5efd6f81e5db6aa8de04e049bc08/1.12.1-pre1.json .json])<br />[https://piston-data.mojang.com/v1/objects/b25c39f4658911169e184f00a24798f6463ded14/server.jar Server]",
            "label": "(link to Tutorial:Installing a version#Manual version installation article, displayed as Downloads)"
        },
        {
            "field": "337",
            "label": "(link to Protocol version article, displayed as Protocol version)"
        },
        {
            "field": "1240",
            "label": "(link to Data version article, displayed as Data version)"
        },
        {
            "field": "3",
            "label": "<span normal;\">(link to Pack format#List of pack formats article, displayed as Resource pack format)</span>"
        },
        {
            "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_8_.28LTS.29 Java SE 8]</span>",
            "label": "<span normal;\">Minimum Java version</span>"
        }
    ],
    "invimages": [],
    "footer": "<table auto; word-break: break-word;\">\n<tr inherit;\">\n<td 0.4em\" >[[Java Edition  1.12|<span  1.12]]</td>\n<td 0.4em\">'''[[Java Edition 1.12.1|1.12.1]]'''</td>\n<td 0.4em\" rowspan=\"2\">[[Java Edition  1.12.2|  1.12.2 <span inherit;\">\n<td 0.4em\">\n[[Java Edition  17w31a|◄   17w31a]]\n</td>\n<td 0.4em\">''' 1.12.1-pre1'''</td>\n</tr>\n</table>"
}

1.12.1-pre1 is the first and only pre-release for Java Edition 1.12.1, released on August 2, 2017,[2] which includes minor optimizations and fixes bugs.

Fixes

3 issues fixed

From released versions before 1.12.1

  • MC-86016 – Some Mojang staff not mentioned in credits.txt.
  • MC-117087 – Class.getSimpleName performance issue with large number of block entities.

From the 1.12.1 development versions

Other

  • Minor optimizations.

Videos

Video made by slicedlime:

Trivia

  • 1.12.1-pre1 was previously removed from the launcher for some time, but was added back in September 2018.

References

  1. ↑ "Important Message: Security vulnerability in Java Edition" – Minecraft.net, December 10, 2021.
  2. ↑ "Minecraft Pre-release 1.12.1-pre1" – Minecraft.net, August 2, 2017.

Sources