Issues

• Code from OpenJDK and a Stack Overflow answer has no licence notice

  com-lihaoyi/upickle#727 · Filter by author vejeta opened on Nov 5, 2026

• ujson accepts unpaired JSON surrogate escapes as raw UTF-16 surrogates

  com-lihaoyi/upickle#722 · Filter by author He-Pin opened on Jul 4, 2026

• Derived pickler for a case class that extends a sealed trait should not require a $type discriminator field

  com-lihaoyi/upickle#705 · Filter by author julienrf opened on May 20, 2026

• Possible problem with serializing a single precision float on Scala.js

  com-lihaoyi/upickle#704 · Filter by author Gleefre opened on May 16, 2026

• ujson silently accepts invalid hex digits in \uXXXX escapes (g, X, Z map to 0)

  com-lihaoyi/upickle#703 · Filter by author haskiindahouse opened on May 10, 2026

• MsgPackReader silently returns empty Array/Map for Array32/Map32 with length >= 2^31

  com-lihaoyi/upickle#702 · Filter by author haskiindahouse opened on May 10, 2026

• Deriving ReadWriter on case class with literal string type fails

  com-lihaoyi/upickle#674 · Filter by author ettoretorti opened on Aug 6, 2025

• Bundle size bloat from implicit val Readers/Writers

  com-lihaoyi/upickle#652 · Filter by author j-mie6 opened on Feb 1, 2025

• Default-value annotation

  com-lihaoyi/upickle#646 · Filter by author malcolmredheron opened on Jan 3, 2025

• Add helpers for recursively looking up things in ujson.Value

  com-lihaoyi/upickle#643 · Filter by author lihaoyi opened on Dec 3, 2024
  1

• Possible dead lock

  com-lihaoyi/upickle#638 · Filter by author mio-19 opened on Oct 19, 2024
  3

• Doesn't work well with custom apply on case class

  com-lihaoyi/upickle#624 · Filter by author mio-19 opened on Sep 4, 2024
  2

• Upickle 4.0.0 breaks binary compatibility with mill/ammonite repl.

  com-lihaoyi/upickle#616 · Filter by author megri opened on Aug 8, 2024
  3

• Deriving ReadWriter for inner sealed trait hierarchy with default values crashes compiler

  com-lihaoyi/upickle#594 · Filter by author uosis opened on Jun 30, 2024

• Separate runtime configuration from custom implicit definition in Api object

  com-lihaoyi/upickle#530 · Filter by author lihaoyi opened on Sep 23, 2023
  1

• Scala 3 Union types don't work well

  com-lihaoyi/upickle#505 · Filter by author lihaoyi opened on Jul 9, 2023
  2

• Add a column-compacted indented output JSON format

  com-lihaoyi/upickle#503 · Filter by author lihaoyi opened on Jul 9, 2023
  1

• More straightforward customization of ReadWriters behaviour

  com-lihaoyi/upickle#486 · Filter by author szymon-rd opened on May 4, 2023

• Library missing pointer syntax

  com-lihaoyi/upickle#368 · Filter by author nicmcd opened on Oct 7, 2021

• Incorrect JSON Null reading for value types

  com-lihaoyi/upickle#355 · Filter by author martin-ockajak opened on Jun 11, 2021
  4

• Runtime MatchError if a type alias and its ReaderWriter are defined

  com-lihaoyi/upickle#289 · Filter by author Governa opened on Oct 17, 2019