The command "cyclonedds typeof" fails to reconstruct the IDL of a derived topic

[adrianomarto]

I got a crash whilst running the command "cyclonedds typeof Derived".

Here is the IDL:

module Hierarchy
{
@mutable struct Base
{
string fieldA;
};

struct Derived : Base
{
string fieldB;
};
};

Here is the stack-trace:

Exception in thread Thread-1 (type_discovery):
Traceback (most recent call last):
File "/usr/lib64/python3.11/threading.py", line 1038, in _bootstrap_inner
self.run()
File "/usr/lib64/python3.11/threading.py", line 975, in run
self._target(*self._args, **self._kwargs)
File "/usr/lib64/python3.11/site-packages/cyclonedds/tools/cli/discovery/main.py", line 281, in type_discovery
datatype, _ = dynamic.get_types_for_typeid(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/dynamic.py", line 69, in get_types_for_typeid
return XTInterpreter.xt_to_class(type_id, typemap)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/idl/_xt_builder.py", line 1458, in xt_to_class
main_type = cls._from_typeid(ident, state)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/idl/_xt_builder.py", line 1503, in _from_typeid
return cls._from_typeobject(ident, state)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/idl/_xt_builder.py", line 1524, in _from_typeobject
return cls._make_complete_struct(ident, complete_obj.struct_type, state)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/idl/_xt_builder.py", line 1592, in _make_complete_struct
struct = make_idl_struct(
^^^^^^^^^^^^^^^^
File "/usr/lib64/python3.11/site-packages/cyclonedds/idl/init.py", line 39, in make_idl_struct
bases = tuple(list(*bases) + [IdlStruct])
^^^^^^^^^^^^
TypeError: 'IdlMeta' object is not iterable

[adrianomarto]

I created the pull request #242 to demonstrate this issue.