An unquoted pipe inside a list, set, or map fails to parse

All 3 scenarios hold

Brackets and braces do not protect a pipe — only quotes do. The pipe splits the row mid-collection, leaving an unbalanced fragment, and the failure surfaces as a generic parse error naming the whole row rather than the pipe. To keep a pipe inside a collection, quote the element: ['a | b']. Every row below fails with a TableTestParseException.