ata-validator

validateJSON() did not return on a document that ends inside an array. validateJSON('[') was one byte, any schema, the default configuration, and it never came back. On a rejection the error carries a caret, so a map from pointer to position is built from the raw text; its array loop asked for the next element without checking that the input had ended, walk returned without moving, and nothing else could close the array. '[}' hung the same way, because a character that begins no value leaves the position where it was. The object loop escaped only by accident: an unterminated string throws, and lib/data-position-cache.js catches throws. It cannot catch a loop. Both container loops now stop at the end of the input, and the array loop stops when an iteration does not advance, so a truncated document still yields a map of what was there.

unevaluatedProperties: false reported the boolean schema underneath the keyword instead of the keyword itself: keyword: 'not', empty params, and an instancePath pointing at the offending member rather than the object holding it. Nothing in that error said which key was unexpected, so a caller branching on params.unevaluatedProperty to flag unknown keys saw nothing at all. It now reports unevaluatedProperties on the object, with params.unevaluatedProperty naming the key, one error per key. unevaluatedItems: false had the same shape and now reports one error for the array, with params.limit at the first unevaluated position. Both engines were changed together and tests/test_unevaluated_error_shape.js holds them to it. Reported by a config linter reading err.params.unevaluatedProperty through ata-validator/compat.

verbose: true attached only parentSchema. It now also attaches data, the value the error points at, and schema, the failing keyword's own value, which is the whole set the option is supposed to carry. Without data a caller had to walk the document by the instance path itself. The default error shape is unchanged: the two fields appear only when verbose is on, including on the errors ata-validator/compat synthesises for an if wrapper.