Some CPython tests fail in integration_tests with conda-forge lpython

[certik]

See #1825 for setup. These fail:

	156 - structs_04 (Failed)
	159 - structs_09 (Failed)
	160 - structs_10 (Failed)
	166 - structs_17 (Failed)
	204 - test_01_goto (Failed)
	225 - lpython_decorator_01 (Failed)

The actual failures are:

ld: library not found for -lpython3.10
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/lpython_decorator_01.py", line 4, in <module>
    @lpython
     ^^^^^^^
  File "/Users/ondrej/repos/lpython/src/runtime/lpython/lpython.py", line 784, in __init__
    assert r == 0, "Failed to create the shared library"
AssertionError: Failed to create the shared library

Here probably python3.11 is used. => must make the decorator more robust

Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/test_01_goto.py", line 35, in <module>
    test_goto()
  File "/Users/ondrej/repos/lpython/integration_tests/test_01_goto.py", line 29, in test_goto
    print(f())
          ^^^
  File "/Users/ondrej/repos/lpython/integration_tests/test_01_goto.py", line 8, in f
    goto .end
    ^^^^
NameError: name 'goto' is not defined

goto does not work somehow.

Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/structs_10.py", line 12, in <module>
    @dataclass
     ^^^^^^^^^
  File "/Users/ondrej/repos/lpython/src/runtime/lpython/lpython.py", line 47, in dataclass
    return py_dataclass(arg)
           ^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1221, in dataclass
    return wrap(cls)
           ^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1211, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 959, in _process_class
    cls_fields.append(_get_field(cls, name, type, kw_only))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 816, in _get_field
    raise ValueError(f'mutable default {type(f.default)} for field '
ValueError: mutable default <class '__main__.Mat'> for field mat is not allowed: use default_factory

and:

Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/structs_17.py", line 3, in <module>
    @dataclass
     ^^^^^^^^^
  File "/Users/ondrej/repos/lpython/src/runtime/lpython/lpython.py", line 47, in dataclass
    return py_dataclass(arg)
           ^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1221, in dataclass
    return wrap(cls)
           ^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1211, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 959, in _process_class
    cls_fields.append(_get_field(cls, name, type, kw_only))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 816, in _get_field
    raise ValueError(f'mutable default {type(f.default)} for field '
ValueError: mutable default <class '__main__.B.C'> for field bc is not allowed: use default_factory

and

Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/structs_09.py", line 7, in <module>
    @dataclass
     ^^^^^^^^^
  File "/Users/ondrej/repos/lpython/src/runtime/lpython/lpython.py", line 47, in dataclass
    return py_dataclass(arg)
           ^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1221, in dataclass
    return wrap(cls)
           ^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1211, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 959, in _process_class
    cls_fields.append(_get_field(cls, name, type, kw_only))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 816, in _get_field
    raise ValueError(f'mutable default {type(f.default)} for field '
ValueError: mutable default <class '__main__.C'> for field bc is not allowed: use default_factory

and

Traceback (most recent call last):
  File "/Users/ondrej/repos/lpython/integration_tests/structs_04.py", line 9, in <module>
    @dataclass
     ^^^^^^^^^
  File "/Users/ondrej/repos/lpython/src/runtime/lpython/lpython.py", line 47, in dataclass
    return py_dataclass(arg)
           ^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1221, in dataclass
    return wrap(cls)
           ^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 1211, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 959, in _process_class
    cls_fields.append(_get_field(cls, name, type, kw_only))
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ondrej/mambaforge/envs/t1/lib/python3.11/dataclasses.py", line 816, in _get_field
    raise ValueError(f'mutable default {type(f.default)} for field '
ValueError: mutable default <class '__main__.A'> for field a is not allowed: use default_factory

Some issue in a dataclass.

[Shaikh-Ubaid]

goto does not work somehow.

I think using .goto in the following place might fix it.

lpython/src/runtime/lpython/lpython.py

Line 6 in 04bf030

from goto import with_goto

[Shaikh-Ubaid]

On making src/runtime/lpython a package and using relative import for goto, I receive the following:

$ python integration_tests/test_01_goto.py
Traceback (most recent call last):
  File "/Users/ubaid/Desktop/OpenSource/lpython/integration_tests/test_01_goto.py", line 35, in <module>
    test_goto()
  File "/Users/ubaid/Desktop/OpenSource/lpython/integration_tests/test_01_goto.py", line 29, in test_goto
    print(f())
          ^^^
  File "/Users/ubaid/Desktop/OpenSource/lpython/integration_tests/test_01_goto.py", line 8, in f
    goto .end
    ^^^^
NameError: name 'goto' is not defined

[Shaikh-Ubaid]

It seems that python 3.11 does not have support for goto (snoack/python-goto#40).

[certik]

The goto's implementation has always been a hack, because it depends on internals of Python.

I think we should remove it, because it's impossible to implement without hacking the byte code, which is not a "public" API.

[Thirumalai-Shaktivel]

The other error:

...
ValueError: mutable default <class '__main__.A'> for field a is not allowed: use default_factory

seems to be caused by the following initialization, removing it yields the output:

lpython/integration_tests/structs_04.py

Line 12 in 6c917f0

a: A = A(f32(0.0), 0)

Also see: https://stackoverflow.com/a/53633297