>>> def function(duplicate, duplicate): ... pass # Expected error message: SyntaxError: duplicate argument 'duplicate' in function definition # Actual error message: SyntaxError: incomplete input

>>> def global_and_parameter(argument, /): ... global argument # It may not be clear for less experienced coders # that a name cannot be global and parameter SyntaxError: incomplete input # However when executed with exec(): SyntaxError: name 'argument' is parameter and global