Error with builtin reduce function used in a function in deferred mode

The following example causes an error in deferred evaluation mode:

min(s) = reduce((x, y: if(x<y, x, y)), s)
a = (n: 2., 3.)
print(reduce((x, y: if(x<y, x, y)), a)) # this always works
print(min(a)) # this causes the error

The error is:

Traceback (most recent call last):
  File "vre-language/src/virtmat/language/utilities/errors.py", line 97, in wrapper
    return func(*args, **kwargs)
  File "vre-language/examples/../scripts/run_model.py", line 89, in evaluate_prog
    print(f'program output: >>>\n{prog.value}\n<<<')
  File "/usr/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 36, 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/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 43, in wrapper
    raise TextXError(str(err), **loc, context=con) from err
textx.exceptions.TextXError: vre-language/examples/2.vm:4:1:  => 'print(min(a))'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "vre-language/examples/../scripts/run_model.py", line 127, in <module>
    main()
  File "vre-language/examples/../scripts/run_model.py", line 123, in main
    evaluate_prog(clargs, prog)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 99, in wrapper
    process_error(err)
  File "vre-language/src/virtmat/language/utilities/errors.py", line 82, in process_error
    raise err.__cause__
  File "vre-language/src/virtmat/language/utilities/errors.py", line 36, in wrapper
    return func(*args, **kwargs)
  File "vre-language/src/virtmat/language/utilities/types.py", line 132, in wrapper
    return checktype_(func(obj), obj.type_)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 922, in func_value
    func, pars = self.func
  File "/usr/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 54, in print_func
    func_pars = [par.func for par in self.params]
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 54, in <listcomp>
    func_pars = [par.func for par in self.params]
  File "/usr/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 70, in print_parameter_func
    return self.param.func
  File "/usr/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 718, in function_call_func
    retfunc = self.expr.func
  File "/usr/lib/python3.10/functools.py", line 981, in __get__
    val = self.func(instance)
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 509, in reduce_func
    mapping = [next(i for i, a in enumerate(npars_u) if a == p) for p in npars]
  File "vre-language/src/virtmat/language/interpreter/deferred_executor.py", line 509, in <listcomp>
    mapping = [next(i for i, a in enumerate(npars_u) if a == p) for p in npars]
StopIteration