Issues

• Several minor (performance) bugs, or oddities

  Mojang/DataFixerUpper#108 · Filter by author MotionlessTrain opened on Jun 16, 2026
  1

• RecordCodecs do not encode fields in the correct order in circumstances

  Mojang/DataFixerUpper#101 · Filter by author ChrysanthCow opened on May 31, 2025

• Java 8 Support

  Mojang/DataFixerUpper#98 · Filter by author TheSerumDev opened on Jan 10, 2025
  2

• Feature Request: Split Codec and Schemas

  Mojang/DataFixerUpper#94 · Filter by author gudenau opened on May 18, 2024

• Feature Request: Introduction of TupleCodec for Heterogeneous List Storage

  Mojang/DataFixerUpper#89 · Filter by author TT432 opened on Mar 22, 2024

• [Request] Supporting more than 16 params for Codecs

  Mojang/DataFixerUpper#82 · Filter by author oliviathevampire opened on Oct 7, 2023

• [Request] Support Multiple Simultaneous Schema Versions

  Mojang/DataFixerUpper#80 · Filter by author gudenau opened on Jul 11, 2023

• Identical lambda expression not garanteed by spec to be equal

  Mojang/DataFixerUpper#79 · Filter by author TheLastRar opened on Jun 7, 2023

• REWRITE_CACHE eviction can fix MC-188163 memory leak

  Mojang/DataFixerUpper#67 · Filter by author MuhammadMinh opened on Oct 22, 2022

• Support for Sets?

  Mojang/DataFixerUpper#64 · Filter by author SoniEx2 opened on Aug 14, 2022
  1

• JsonOps.convertTo explodes on JsonNulls

  Mojang/DataFixerUpper#62 · Filter by author quat1024 opened on Apr 11, 2022
  1

• Expand the set of primitive codecs and operations in DynamicOps

  Mojang/DataFixerUpper#58 · Filter by author RainWarrior opened on Apr 26, 2021
  1

• Partial Result Handling for EitherCodec and Collections Codec

  Mojang/DataFixerUpper#57 · Filter by author Cyborgmas opened on Feb 18, 2021

• [Feature Suggestion] Give more details when crashing

  Mojang/DataFixerUpper#56 · Filter by author oliviathevampire opened on Jan 29, 2021

• Type Building Assumes that you have recursive types

  Mojang/DataFixerUpper#45 · Filter by author lochnessdragon opened on Feb 14, 2020

• Datafixers.Dynamic can't convert boolean values. always 'false'

  Mojang/DataFixerUpper#44 · Filter by author ch99q opened on Jan 22, 2020
  2

• Trying to update with no registered fixers causes NPE

  Mojang/DataFixerUpper#43 · Filter by author i509VCB opened on Sep 25, 2019

• More Minecraft remnants

  Mojang/DataFixerUpper#41 · Filter by author quat1024 opened on May 3, 2019
  2

• Examples?

  enhancement
  Mojang/DataFixerUpper#19 · Filter by author ryantheleach opened on Oct 7, 2018
  10