The in.json file are apparently utf-8 format, but that is not necessarily what with-open-file uses (it is not specified in the standard). LispWorks uses :latin-1, and therefore the tests fail on some of files (test/yaml-test-suite-data/yaml-test-suite-data-2020-08-01/G4RS/in.json and test/yaml-test-suite-data/yaml-test-suite-data-2020-08-01/H3Z8/in.json).
changing the line above to
(uiop/stream:with-input-file (f ,json)
because uiop-stream (part of asdf) defaults to utf-8.
https://github.com/jasom/nyaml/blob/4bd950e8839710af50ffe38a750edc85e406c05e/test/yaml-test-suite.lisp#L19
The in.json file are apparently utf-8 format, but that is not necessarily what with-open-file uses (it is not specified in the standard). LispWorks uses :latin-1, and therefore the tests fail on some of files (test/yaml-test-suite-data/yaml-test-suite-data-2020-08-01/G4RS/in.json and test/yaml-test-suite-data/yaml-test-suite-data-2020-08-01/H3Z8/in.json).
changing the line above to
(uiop/stream:with-input-file (f ,json)because uiop-stream (part of asdf) defaults to utf-8.https://common-lisp.net/project/asdf/uiop.html