reference count encoding in the connect function about pyodbc HOT 5 OPEN

import pyodbc

print(pyodbc.version)  # 5.1.0

connection_string = (
    "DRIVER=ODBC Driver 18 for SQL Server;"
    "SERVER=192.168.0.199;"
    "UID=scott;PWD=tiger^5HHH;"
    "DATABASE=test;"
    "TrustServerCertificate=yes;"
)

enc = "UTF-16LE"
print(sys.getrefcount(enc))  # 4
cnxn = pyodbc.connect(connection_string, encoding=enc)
print(sys.getrefcount(enc))  # 3

print(sys.getrefcount(enc))  # 4
cnxn = pyodbc.connect(connection_string, encoding=enc)
print(sys.getrefcount(enc))  # 3

import sys
import pyodbc
import sqlite3

con = sqlite3.connect("abc.db")
cur = con.cursor()
cur.execute("CREATE TABLE simple(example TEXT)")
con.close()

print(pyodbc.version)
#py> 5.1.0

connection_string = "Driver=SQLite3;Database=./abc.db"
encoding = "UTF-16LE"

sys.getrefcount(encoding)
#py> 2
cnxn = pyodbc.connect(connection_string, encoding=encoding)
sys.getrefcount(encoding)
#py> Segmentation fault

def connect(connstring: Optional[str] = None,
            /, *,  # only positional parameters before, only named parameters after
            autocommit: bool = False,
            encoding: str = 'utf-16le',
            readonly: bool = False,
            timeout: int = 0,
            attrs_before: Optional[Dict[int, Any]] = None,
            **kwargs: Any) -> Connection:

enc = "UTF-16LE"
print(sys.getrefcount(enc))
# 4
cnxn = pyodbc.connect(connection_string, encoding=enc)
print(sys.getrefcount(enc))
# 3
cnxn.close()
cnxn = pyodbc.connect(connection_string, encoding=enc)
print(sys.getrefcount(enc))
# 2
cnxn.close()
cnxn = pyodbc.connect(connection_string, encoding=enc)
print(sys.getrefcount(enc))
# 1
#
# Process finished with exit code 139 (interrupted by signal 11:SIGSEGV)