The _clean_span_descriptions method checks if "description" in s: which only verifies the key exists, not that its value is non-None. When s["description"] is None (which is valid per the span serialization at tracing.py:702), calling re.sub(r"\s+", " ", s["description"]) raises TypeError: expected string or bytes-like object, got 'NoneType'. Since this code runs outside capture_internal_exceptions(), the error will propagate and could crash transaction processing.

The _clean_span_descriptions method calls re.sub() on s["description"] after checking if "description" in s, but description can be None (spans are created via to_json() which always includes "description": self.description, even when the description is None). This will raise TypeError: expected string or bytes-like object, got 'NoneType'. Since the call to _clean_span_descriptions is outside the capture_internal_exceptions() context manager, this exception could cause event processing to fail.