Reject SQL queries containing null characters (RustPython#5981)

Author: ever0de

Lib/test/test_sqlite3/test_regression.py

@@ -329,8 +329,6 @@ def test_invalid_isolation_level_type(self):
                           sqlite.connect, ":memory:", isolation_level=123)
 
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_null_character(self):
         # Issue #21147
         cur = self.con.cursor()

stdlib/src/sqlite.rs

@@ -2302,6 +2302,12 @@ mod _sqlite {
             vm: &VirtualMachine,
         ) -> PyResult<Option<Self>> {
             let sql = sql.try_into_utf8(vm)?;
+            if sql.as_str().contains('\0') {
+                return Err(new_programming_error(
+                    vm,
+                    "statement contains a null character.".to_owned(),
+                ));
+            }
             let sql_cstr = sql.to_cstring(vm)?;
             let sql_len = sql.byte_len() + 1;