conda-build fails to build with Python 3.14.0a6. There are two failed tests with the same traceback FAILED tests/cli/test_main_build.py::test_build_with_empty_channel_fails - TypeError: _WorkItem.__init__() takes 3 positional arguments but 5 were given FAILED tests/cli/test_main_render.py::test_render_with_empty_channel_fails - TypeError: _WorkItem.__init__() takes 3 positional arguments but 5 were given _____________________ test_build_with_empty_channel_fails ______________________ Traceback (most recent call last): File "/usr/lib/python3.14/site-packages/_pytest/runner.py", line 341, in from_call result: TResult | None = func() ~~~~^^ File "/usr/lib/python3.14/site-packages/flaky/flaky_pytest_plugin.py", line 146, in <lambda> lambda: ihook(item=item, **kwds), when=when, reraise=reraise ~~~~~^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_hooks.py", line 513, in __call__ return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult) ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_manager.py", line 120, in _hookexec return self._inner_hookexec(hook_name, methods, kwargs, firstresult) ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 139, in _multicall raise exception.with_traceback(exception.__traceback__) File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 122, in _multicall teardown.throw(exception) # type: ignore[union-attr] ~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/_pytest/threadexception.py", line 92, in pytest_runtest_call yield from thread_exception_runtest_hook() File "/usr/lib/python3.14/site-packages/_pytest/threadexception.py", line 68, in thread_exception_runtest_hook yield File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 122, in _multicall teardown.throw(exception) # type: ignore[union-attr] ~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/_pytest/unraisableexception.py", line 95, in pytest_runtest_call yield from unraisable_exception_runtest_hook() File "/usr/lib/python3.14/site-packages/_pytest/unraisableexception.py", line 70, in unraisable_exception_runtest_hook yield File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 122, in _multicall teardown.throw(exception) # type: ignore[union-attr] ~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/_pytest/logging.py", line 846, in pytest_runtest_call yield from self._runtest_for(item, "call") File "/usr/lib/python3.14/site-packages/_pytest/logging.py", line 829, in _runtest_for yield File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 122, in _multicall teardown.throw(exception) # type: ignore[union-attr] ~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/_pytest/capture.py", line 880, in pytest_runtest_call return (yield) ^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 122, in _multicall teardown.throw(exception) # type: ignore[union-attr] ~~~~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/_pytest/skipping.py", line 257, in pytest_runtest_call return (yield) ^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 103, in _multicall res = hook_impl.function(*args) File "/usr/lib/python3.14/site-packages/_pytest/runner.py", line 174, in pytest_runtest_call item.runtest() ~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/_pytest/python.py", line 1627, in runtest self.ihook.pytest_pyfunc_call(pyfuncitem=self) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_hooks.py", line 513, in __call__ return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult) ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_manager.py", line 120, in _hookexec return self._inner_hookexec(hook_name, methods, kwargs, firstresult) ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 139, in _multicall raise exception.with_traceback(exception.__traceback__) File "/usr/lib/python3.14/site-packages/pluggy/_callers.py", line 103, in _multicall res = hook_impl.function(*args) File "/usr/lib/python3.14/site-packages/_pytest/python.py", line 159, in pytest_pyfunc_call result = testfunction(**testargs) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/tests/cli/test_main_build.py", line 560, in test_build_with_empty_channel_fails main_build.execute( ~~~~~~~~~~~~~~~~~~^ [ ^ ...<4 lines>... ] ^ ) ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/cli/main_build.py", line 648, in execute api.build( ~~~~~~~~~^ parsed.recipe, ^^^^^^^^^^^^^^ ...<8 lines>... cache_dir=parsed.cache_dir, ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/api.py", line 211, in build return build_tree( recipes, ...<7 lines>... variants=variants, ) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/build.py", line 3653, in build_tree packages_from_this = build( metadata, ...<5 lines>... notest=notest, ) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/build.py", line 2337, in build output_metas = expand_outputs([(m, need_source_download, need_reparse_in_env)]) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/render.py", line 926, in expand_outputs for output_dict, m in deepcopy(_m).get_output_metadata_set( ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ permit_unsatisfiable_variants=False ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ): ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/metadata.py", line 2662, in get_output_metadata_set conda_packages = finalize_outputs_pass( ref_metadata, ...<3 lines>... bypass_env_check=bypass_env_check, ) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/metadata.py", line 1009, in finalize_outputs_pass fm = finalize_metadata( om, parent_metadata=parent_metadata, permit_unsatisfiable_variants=permit_unsatisfiable_variants, ) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/render.py", line 649, in finalize_metadata build_unsat, host_unsat = add_upstream_pins( ~~~~~~~~~~~~~~~~~^ m, permit_unsatisfiable_variants, exclude_pattern ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/render.py", line 464, in add_upstream_pins build_deps, build_unsat, extra_run_specs_from_build = _read_upstream_pin_files( ~~~~~~~~~~~~~~~~~~~~~~~~^ m, "build", permit_unsatisfiable_variants, exclude_pattern ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/render.py", line 443, in _read_upstream_pin_files deps, precs, unsat = get_env_dependencies( ~~~~~~~~~~~~~~~~~~~~^ m, ^^ ...<3 lines>... permit_unsatisfiable_variants=permit_unsatisfiable_variants, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^ File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/render.py", line 157, in get_env_dependencies precs = environ.get_package_records( tmpdir, ...<11 lines>... channel_urls=tuple(m.config.channel_urls), ) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/environ.py", line 890, in get_install_actions _actions = _install_actions(prefix, index, specs, subdir=subdir) File "/builddir/build/BUILD/conda-build-24.11.2-build/conda-build-24.11.2/conda_build/environ.py", line 1304, in install_actions txn = solver.solve_for_transaction(prune=False, ignore_pinned=False) File "/usr/lib/python3.14/site-packages/conda/core/solve.py", line 153, in solve_for_transaction unlink_precs, link_precs = self.solve_for_diff( ~~~~~~~~~~~~~~~~~~~^ update_modifier, ^^^^^^^^^^^^^^^^ ...<5 lines>... should_retry_solve, ^^^^^^^^^^^^^^^^^^^ ) ^ File "/usr/lib/python3.14/site-packages/conda/core/solve.py", line 222, in solve_for_diff final_precs = self.solve_final_state( update_modifier, ...<4 lines>... should_retry_solve, ) File "/usr/lib/python3.14/site-packages/conda_libmamba_solver/solver.py", line 231, in solve_final_state index = IndexHelper( installed_records=(*in_state.installed.values(), *in_state.virtual.values()), ...<3 lines>... load_pkgs_cache=context.offline, ) File "/usr/lib/python3.14/site-packages/conda_libmamba_solver/index.py", line 136, in __init__ self._index = self._load_channels() ~~~~~~~~~~~~~~~~~~~^^ File "/usr/lib/python3.14/site-packages/conda_libmamba_solver/index.py", line 335, in _load_channels jsons = {url: str(path) for (url, path) in executor.map(self._fetch_channel, urls)} ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib64/python3.14/concurrent/futures/_base.py", line 618, in map fs = [self.submit(fn, *args) for args in zipped_iterables] ~~~~~~~~~~~^^^^^^^^^^^ File "/usr/lib/python3.14/site-packages/conda/common/io.py", line 634, in submit w = _WorkItem(f, fn, args, kwargs) TypeError: _WorkItem.__init__() takes 3 positional arguments but 5 were given ---------------------------- Captured stderr setup ----------------------------- 2025-03-31T07:19:39 Subdir: noarch Gathering repodata 2025-03-31T07:19:39 noarch Writing pre-patch repodata 2025-03-31T07:19:39 noarch Applying patch instructions 2025-03-31T07:19:39 noarch Writing patched repodata 2025-03-31T07:19:39 noarch Building current_repodata subset 2025-03-31T07:19:39 noarch Writing current_repodata subset 2025-03-31T07:19:39 noarch Writing index HTML ----------------------------- Captured stdout call ----------------------------- Adding in variants from internal_defaults Attempting to finalize metadata for requires_external_channel Channels: - file:///tmp/pytest-of-mockbuild/pytest-0/test_build_with_empty_channel_0 - file:///tmp/pytest-of-mockbuild/pytest-0/empty_channel Platform: linux-64 Collecting package metadata (repodata.json): ...working... failed ----------------------------- Captured stderr call ----------------------------- WARNING: No numpy version specified in conda_build_config.yaml. Falling back to default numpy value of 1.26 ------------------------------ Captured log call ------------------------------- INFO conda_build.variants:variants.py:268 Adding in variants from internal_defaults WARNING conda_build.metadata:metadata.py:211 No numpy version specified in conda_build_config.yaml. Falling back to default numpy value of 1.26 INFO conda_build.metadata:metadata.py:979 Attempting to finalize metadata for requires_external_channel https://docs.python.org/3.14/whatsnew/3.14.html For the build logs, see: https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08837205-conda-build/ For all our attempts to build conda-build with Python 3.14, see: https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/conda-build/ Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.14: https://copr.fedorainfracloud.org/coprs/g/python/python3.14/ Let us know here if you have any questions. Python 3.14 is planned to be included in Fedora 43. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14. A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon. We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.