Hacktoberfest 2026: los issues que los mantenedores marcaron para octubre, abiertos y aptos para principiantes. Explorar issues de Hacktoberfest

Nil tag with implicit: false raises error on SnakeYAML

Abierto
  • ¿Algo no está bien?
#500 1 comentario 0 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
25/100
Tipo de issue
Error
Claridad
Necesita aclaración
Estado de actividad
Estancado
Stack tecnológico
java, ruby
Área
tooling

Línea de trabajo

Comienza en lib/psych/visitors/yaml_tree.rb alrededor de la línea 520 y sigue el tag nil y el valor implícito hasta el emitter, incluido org/jruby/ext/psych/PsychEmitter.java. Reproduce las pruebas de #475 o los fallos restantes de JRuby PR #6680 y verifica después que volcar el mapping afectado ya no provoque el error de tag de SnakeYAML.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

JRuby

The following line, when reached by the tests from #475, triggers SnakeYAML to raise an error:

https://github.com/ruby/psych/blob/546154ddb71b125794c5eed36817ad27ac373dd5/lib/psych/visitors/yaml_tree.rb#L520

The error:

RuntimeError: org.yaml.snakeyaml.emitter.EmitterException: tag is not specified
                      scalar at org/jruby/ext/psych/PsychEmitter.java:206
    visit_Psych_Nodes_Scalar at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:32
                       visit at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:30
                      accept at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:6
   visit_Psych_Nodes_Mapping at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:43
                        each at org/jruby/RubyArray.java:1864
   visit_Psych_Nodes_Mapping at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:43
                       visit at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:30
                      accept at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:6
  visit_Psych_Nodes_Document at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:27
                        each at org/jruby/RubyArray.java:1864
  visit_Psych_Nodes_Document at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:27
                       visit at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:30
                      accept at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:6
    visit_Psych_Nodes_Stream at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:21
                        each at org/jruby/RubyArray.java:1864
    visit_Psych_Nodes_Stream at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/emitter.rb:21
                       visit at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:30
                      accept at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors/visitor.rb:6
                        yaml at /Users/headius/projects/jruby/lib/ruby/stdlib/psych/nodes/node.rb:61
                        dump at /Users/headius/projects/jruby/lib/ruby/stdlib/psych.rb:515
                      <main> at blah.rb:13

As far as I can tell, the issue is that the tag is nil and implicit is false, which is prohibited in SnakeYAML for a mapping.

This is somewhat outside my understanding of YAML and I am not sure whether this constitutes an improper behavioral difference in SnakeYAML or not.

The implicit value comes from the default @implicit of Coder, and is never set to true in the logic hit by the tests mentioned above. As it stands I do not know how to reconcile the values being passed in with the SnakeYAML hard error.

This leads to the remaining failures in https://github.com/jruby/jruby/pull/6680, which I will exclude to proceed with the Psych update.

Lenguaje dominante
Ruby
Estrellas
597
Forks
223
Merge medio
6 h 8 min
PR fusionados (30 d)
2

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

Más de ruby/psych

Todos los issues de ruby/psych

Issues similares

Más issues de Ruby

Recibe los nuevos issues en tu correo

Un resumen breve de issues de GitHub para principiantes.