Issues

• Parser panics on an empty tagged value under a %TAG !! directive

  goccy/go-yaml#987 · Filter by author zoncoen opened on Nov 6, 2026

• Marshal emits invalid YAML for strings beginning with '? '

  bug
  goccy/go-yaml#982 · Filter by author agammann opened on Nov 1, 2026

• Marshal: return an error instead of overflowing the stack on cyclic values

  goccy/go-yaml#978 · Filter by author hidingmyname opened on Oct 30, 2026

• Flow(true) + UseLiteralStyleIfMultiline(true) emits a block scalar inside a flow mapping, which can't be unmarshaled

  goccy/go-yaml#977 · Filter by author hidingmyname opened on Oct 30, 2026

• Marshal emits a literal block scalar without an indentation indicator for strings starting with newline(s) followed by spaces; output can't be unmarshaled

  goccy/go-yaml#976 · Filter by author hidingmyname opened on Oct 30, 2026

• Explicitly indented block scalars reject trailing empty lines at EOF

  goccy/go-yaml#974 · Filter by author owenshen0907 opened on Oct 30, 2026

• Decode time is quadratic on the number of CustomUnmarshaler nodes

  bug
  goccy/go-yaml#965 · Filter by author orivej opened on Oct 23, 2026

• Merge key overwrites explicit keys and decodes the anchor again on every merge

  goccy/go-yaml#964 · Filter by author AdamAkhlaq opened on Oct 20, 2026

• !!int and !!float return 0 instead of an error for values that are not numbers

  goccy/go-yaml#962 · Filter by author AdamAkhlaq opened on Oct 20, 2026

• YAMLToJSON and JSON() write invalid JSON for infinity, NaN and control characters

  goccy/go-yaml#960 · Filter by author AdamAkhlaq opened on Oct 20, 2026

• Alias resolves to a later redefinition of its anchor when the anchored value is decoded into any

  goccy/go-yaml#956 · Filter by author yhgrwav opened on Oct 13, 2026

• Multi-line plain scalar in a flow mapping is split when indented less than its key

  goccy/go-yaml#951 · Filter by author mvdan opened on Oct 8, 2026

• Quoted explicit key sets the indentation of its block scalar value

  goccy/go-yaml#950 · Filter by author mvdan opened on Oct 8, 2026

• Literal tab characters in double-quoted strings cause parsing to skip closing double-quote

  bug
  goccy/go-yaml#948 · Filter by author gdavison opened on Oct 7, 2026

• A tab inside a plain scalar is removed when decoding

  goccy/go-yaml#940 · Filter by author DRMacIver opened on Sep 23, 2026

• [GLD Serializer Benchmark] Go goccy/go-yaml 1.19.2 — spec compliance misses

  goccy/go-yaml#932 · Filter by author leo-gan opened on Sep 14, 2026

• Type errors in nested structs name the outermost field, not the one that failed

  goccy/go-yaml#930 · Filter by author wayneeseguin opened on Sep 3, 2026

• Flow style yaml files perform poor compared to block style ones

  bug
  goccy/go-yaml#928 · Filter by author laraibg786 opened on Sep 2, 2026

• Support custom (un)marshaler interfaces

  feature request
  goccy/go-yaml#922 · Filter by author nvx opened on Aug 21, 2026

• Marshal emits the string map key "<<" as an unquoted merge key

  goccy/go-yaml#917 · Filter by author kaptinlin opened on Aug 9, 2026

• Dynamic map roundtrip changes scientific notation from float64 to string

  goccy/go-yaml#916 · Filter by author kaptinlin opened on Aug 9, 2026

• Segfault when unmarshaling key: !!binary ... into []byte field of struct

  bug
  goccy/go-yaml#909 · Filter by author vegas503 opened on Aug 4, 2026

• UTF-8 byte order mark at the start of a stream is treated as content

  bug
  goccy/go-yaml#906 · Filter by author cuematthew opened on Jul 31, 2026
  1

• parser: explicitly tagged quoted merge key such as !!merge "<<" fails to parse

  bug
  goccy/go-yaml#905 · Filter by author cuematthew opened on Jul 31, 2026
  1

• Fails to parse YAML with comments in flow maps

  bug
  goccy/go-yaml#903 · Filter by author notpeelz opened on Jul 29, 2026