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UTF-8 byte-backed parsers report raw byte instead of decoded character for invalid root-value separator

Status: Open.

#1664 In FasterXML/jackson-core;

· Dongnyoung opened on Aug 15, 2026

Stale symbol table child can replace a newer root table

Status: Open.

#1654 In FasterXML/jackson-core;

· Dongnyoung opened on Aug 12, 2026

No-allocation DoubleToDecimal / FloatToDecimal

Status: Open.

#1652 In FasterXML/jackson-core;

· westinrm opened on Aug 11, 2026

Non-root number separator validation not applied to non-blocking (async) parser (follow-up to #1557)

Status: Open.

#1640 In FasterXML/jackson-core;

· seonwooj0810 opened on Jul 24, 2026

Add support for char-based NonBlockingInputFeeder

Status: Open.

#1604 In FasterXML/jackson-core;

· robtimus opened on Apr 29, 2026

Parsing for non-root number values fails lazily

3.xIssues to be only tackled for Jackson 3.x, not 2.xIssues to be only tackled for Jackson 3.x, not 2.x

Status: Open.

#1557 In FasterXML/jackson-core;

· cowtowncoder opened on Feb 25, 2026

Implement novel, branch-free JSON escaping algorithm

Status: Open.

#1384 In FasterXML/jackson-core;

· franz1981 opened on Jan 10, 2025

JDK compatibility issues with jackson-core 2.14 and later due to Multi-Release (MR) jars

will-not-fixNo plans to address the issueNo plans to address the issue

Status: Open.

#1210 In FasterXML/jackson-core;

· techwhizbang opened on Feb 6, 2024

Allow suppresion of source information in exception messages

Status: Open.

#1158 In FasterXML/jackson-core;

· jamesagnew opened on Dec 6, 2023

Explicitly indicate Nullability of arguments and return values (JSpecify) -- for 3.3?

3.xIssues to be only tackled for Jackson 3.x, not 2.xIssues to be only tackled for Jackson 3.x, not 2.x

Status: Open.

#1105 In FasterXML/jackson-core;

· k163377 opened on Sep 9, 2023

Support writing only (some?) longs as strings (opt-in) for Javascript compatibility

Status: Open.

#1044 In FasterXML/jackson-core;

· rdesgroppes opened on Jun 12, 2023

Add support to get canonical JSON output (what is still missing as of 3.0?)

Status: Open.

#1037 In FasterXML/jackson-core;

· digulla opened on May 26, 2023