Python3 syntax for *args notation of base classes raises an assertion in Nuitka

Versions:

• Nuitka 0.5.29.4
• Python 3.6.5
• MacOS 10.13.4

Installed Nuitka with python3 -m pip install nuitka.

Problem

bases.py:

class A: pass
class B: pass

bases = (A, B)

class C(*bases): pass

Verbose output:

% python3 -m nuitka --verbose bases.py
Nuitka:WARNING:Problem at '<SourceCodeReference to bases.py:6>' with Starred(value=Name(id='bases', ctx=Load()), ctx=Load()).
Nuitka:WARNING:Problem at '<SourceCodeReference to bases.py:6>' with ClassDef(name='C', bases=[Starred(value=Name(id='bases', ctx=Load()), ctx=Load())], keywords=[], body=[Pass()], decorator_list=[]).
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/nuitka/__main__.py", line 213, in <module>
    main()
  File "/usr/local/lib/python3.6/site-packages/nuitka/__main__.py", line 207, in main
    MainControl.main()
  File "/usr/local/lib/python3.6/site-packages/nuitka/MainControl.py", line 758, in main
    filename = filename
  File "/usr/local/lib/python3.6/site-packages/nuitka/MainControl.py", line 78, in createNodeTree
    is_main  = not Options.shallMakeModule()
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/Building.py", line 1100, in buildModuleTree
    is_main     = is_main
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/Building.py", line 1044, in createModuleTree
    is_main     = is_main
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/Building.py", line 748, in buildParseTree
    source_ref = source_ref
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/TreeHelpers.py", line 351, in buildStatementsNode
    statements = buildNodeList(provider, nodes, source_ref, allow_none = True)
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/TreeHelpers.py", line 305, in buildNodeList
    entry = buildNode(provider, node, node_source_ref, allow_none)
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/TreeHelpers.py", line 262, in buildNode
    source_ref = source_ref
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/ReformulationClasses.py", line 920, in buildClassNode
    return _buildClassNode3(provider, node, source_ref)
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/ReformulationClasses.py", line 334, in _buildClassNode3
    source_ref
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/TreeHelpers.py", line 305, in buildNodeList
    entry = buildNode(provider, node, node_source_ref, allow_none)
  File "/usr/local/lib/python3.6/site-packages/nuitka/tree/TreeHelpers.py", line 276, in buildNode
    assert False, ast.dump(node)
AssertionError: Starred(value=Name(id='bases', ctx=Load()), ctx=Load())

[kayhayen]

Yes, indeed, it is using eval, and therefore effectively not testing Nuitka for real. That is why there is a script that parses docstrings and creates code from it, e.g. like this:

http://nuitka.net/gitweb/?p=tests-Nuitka-CPython.git;a=blob_plain;f=doctest_generated/test_metaclass.py;hb=refs/heads/CPython36

Essentially just output an exception if any for every statement and output everything that is an expression. With this simple approach, I am getting this covered too.

The list of doctests is manually maintained though.

Anyway, I did the hotfix, there was something for Windows to be fixed so I did one still.

[pomidoroshev]

That was really fast, thank you!