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Alias names are too permissive in SnakeYAML-Engine #689

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headius opened this issue Oct 6, 2024 · 1 comment

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headius commented Oct 6, 2024

See original issue at jruby/jruby#8352.

The following YAML fails to parse in SnakeYAML-Engine, used by the JRuby Psych extension:

--- &1 !ruby/object:Set
hash:
  :one: true
  :two: true
  *1: true

This is due to a bug in SnakeYAML-Engine reported here: https://bitbucket.org/snakeyaml/snakeyaml-engine/issues/54/do-not-allow-colon-to-be-a-part-of-an

This will be fixed shortly in an upcoming release of SnakeYAML-Engine. Psych will need to be updated to the new version and released.

headius mentioned this issue

Cyclic references in Set objects raise exception with YAML#load jruby/jruby#8352

Open

perlpunk commented Oct 6, 2024

The proper fix is to add a space after the alias:

  *1 : true

It's valid to have a colon in anchor names (and yes, I agree that it should have been forbidden, but it isn't).

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