fix: handle non-BMP Unicode codepoints in foldl, foldr, and %c format#606
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stephenamar-db merged 1 commit intodatabricks:masterfrom Feb 23, 2026
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foldl/foldr iterated strings by UTF-16 code unit (for (char <- s.value)), splitting non-BMP characters like emoji into surrogate pair halves. Use codePointAt/codePointBefore with Character.charCount for correct codepoint iteration. The %c format conversion used s.toChar.toString which truncates codepoints above U+FFFF to 16 bits. Use Character.toString(s.toInt) instead. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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This PR fixes two more non-BMP Unicode bugs:
for (char <- s.value)), splitting non-BMP characters like emoji into surrogate pair halves. UsecodePointAt/codePointBeforewithCharacter.charCountfor correct codepoint iteration.%cformat conversion useds.toChar.toStringwhich truncates codepoints above U+FFFF to 16 bits. UseCharacter.toString(s.toInt)instead.All code written by Claude Opus 4.6.