v66.19.2

Sequence patterns match over lazy sequences (#3723)

Enhancements:

• A pattern in square brackets matches over any Iterable[T], not just
  lists and arrays: a pipe, a generator result, a range
• A string matches as a lazy sequence of its chars; its rest element is
  a sequence of chars rather than a string
• A rest element over a lazy sequence is a lazy sequence of its own: its
  first read continues the pull, later reads re-derive from the source
• A case over a lazy sequence is exhaustiveness-checked the same way as
  over a list

Technical:

• One pull per matching statement, shared by every arm, its elements in
  locals; rest is built from the Ghul.Pipes buffered pipe stages
  (ghul-runtime 31.0.0)
• Lazy matching is not built for while let, guards, case-pattern
  nesting, assignment, or generator and async bodies

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Co-authored-by: ghul-coder[bot] <286450068+ghul-coder[bot]@users.noreply.github.com>
Co-authored-by: GLM-5.3 noreply@z.ai