Dec 13, 2025 · Dec 13, 2025 · Dec 13, 2025 · Dec 13, 2025
diff --git a/libs/text-splitters/langchain_text_splitters/character.py b/libs/text-splitters/langchain_text_splitters/character.py

    def split_text(self, text: str) -> list[str]:
        """Split into chunks without re-inserting lookaround separators."""
        # 🔒 Defensive validation
        if self._chunk_overlap > self._chunk_size:
            error_msg = "chunk_overlap must be <= chunk_size"
            raise ValueError(error_msg)

        # 1. Determine split pattern: raw regex or escaped literal
        sep_pattern = (
            self._separator if self._is_separator_regex else re.escape(self._separator)
Original file line number	Diff line number	Diff line change
Expand Up		@@ -24,6 +24,11 @@ def __init__(

		def split_text(self, text: str) -> list[str]:
		"""Split into chunks without re-inserting lookaround separators."""
		# 🔒 Defensive validation
		if self._chunk_overlap > self._chunk_size:
		error_msg = "chunk_overlap must be <= chunk_size"
		raise ValueError(error_msg)

		# 1. Determine split pattern: raw regex or escaped literal
		sep_pattern = (
		self._separator if self._is_separator_regex else re.escape(self._separator)
Expand Down