map with lambda with non-matching argument-parameter

Running the example series_len.vm in instant evaluation mode returns: 'len(s) =' 5. But in deferred mode this error occurs:

Traceback (most recent call last):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 223, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/cli/run_model.py", line 92, in evaluate_prog
    print(f'program output: >>>\n{prog.value}\n<<<')
  File "/usr/lib64/python3.8/functools.py", line 967, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 152, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/interpreter/instant_executor.py", line 50, in program_value
    vals = [p.value for p in get_children_of_type('Print', self) if p.value]
  File "vre-language/src/virtmat/language/interpreter/instant_executor.py", line 50, in <listcomp>
    vals = [p.value for p in get_children_of_type('Print', self) if p.value]
  File "/usr/lib64/python3.8/functools.py", line 967, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 156, in wrapper
    raise TextXError(str(err), **get_location_context(obj)) from err
textx.exceptions.TextXError: vre-language/examples/series_len.vm:2:1: map() must have at least two arguments. => 'print('len(s) =', sum(map((x: 1), s)))'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "jupyter-tensorflow-2023-01-02/bin/texts", line 8, in <module>
    sys.exit(texts())
  File "vre-language/src/virtmat/language/cli/__init__.py", line 25, in texts
    clargs.func(clargs)
  File "vre-language/src/virtmat/language/cli/run_model.py", line 125, in main
    evaluate_prog(clargs, prog)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 225, in wrapper
    process_error(err)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 213, in process_error
    raise err.__cause__
  File "vre-language/src/virtmat/language/utilities/errors.py", line 152, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/utilities/types.py", line 200, in wrapper
    return checktype_(func(obj), obj.type_)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 919, in func_value
    return func(*[p.value for p in pars])
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 62, in retfunc
    values = [formatter(f(*a)) for f, a in zip(funcs, pargs)]
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 62, in <listcomp>
    values = [formatter(f(*a)) for f, a in zip(funcs, pargs)]
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 521, in <lambda>
    retfunc = (lambda *x: func(pfun(*x)), pars)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 474, in get_map_val
    return typemap['Series'](map(partial(nfunc, *pargs), *iterables), name=name)
TypeError: map() must have at least two arguments.