Merge option returns different output when switching order of merging files

[codbfilip]

yq version 3.1.0

When I merge two files with append option i got two different results based on order of files.

Input files:

first.yml

volumes:
  app: {}
  app-cache:
    driver_opts:
      type: none

second.yml

 volumes:
      backups:
        driver_opts:
          type: none

Command: yq m -a first.yml second.yml > output.yml (returns correct output)

volumes:
  app: {}
  app-cache:
    driver_opts:
      type: none
  backups:
    driver_opts:
      type: none

Command: yq m -a second.yml first.yml > output.yml

volumes:
  backups:
    driver_opts:
      type: none
  app-cache:
    driver_opts:
      type: none

Expected result: the output should contain all keys regardless of the order of the files

[mikefarah]

Looks like app gets skipped because its {}. Interestingly it works if its null or empty...

[mikefarah]

Related to #355

[mikefarah]

Fixed in https://github.com/mikefarah/yq/releases/tag/3.1.2