Free-threaded Python Library Compatibility Checker

  error: subprocess-exited-with-error
  
  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 1
  ╰─> [44 lines of output]
      Ignoring cffi: markers 'platform_python_implementation != "PyPy" and python_version == "3.8"' don't match your environment
      Collecting maturin<2,>=1.9.4
        Using cached maturin-1.9.4-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl.metadata (16 kB)
      Collecting cffi>=2.0.0
        Using cached cffi-2.0.0.tar.gz (523 kB)
        Installing build dependencies: started
        Installing build dependencies: finished with status 'done'
        Getting requirements to build wheel: started
        Getting requirements to build wheel: finished with status 'error'
        error: subprocess-exited-with-error
      
        × Getting requirements to build wheel did not run successfully.
        │ exit code: 1
        ╰─> [20 lines of output]
            Traceback (most recent call last):
              File "/tmp/tmp9gyzlcqc/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
                main()
                ~~~~^^
              File "/tmp/tmp9gyzlcqc/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
                json_out["return_val"] = hook(**hook_input["kwargs"])
                                         ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/tmp9gyzlcqc/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
                return hook(config_settings)
              File "/tmp/pip-build-env-0lnhz8gu/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
                return self._get_build_requires(config_settings, requirements=[])
                       ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/pip-build-env-0lnhz8gu/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
                self.run_setup()
                ~~~~~~~~~~~~~~^^
              File "/tmp/pip-build-env-0lnhz8gu/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 317, in run_setup
                exec(code, locals())
                ~~~~^^^^^^^^^^^^^^^^
              File "<string>", line 22, in <module>
            RuntimeError: CFFI does not support the free-threaded build of CPython 3.13. Upgrade to free-threaded 3.14 or newer to use CFFI with the free-threaded build.
            [end of output]
      
        note: This error originates from a subprocess, and is likely not a problem with pip.
      error: subprocess-exited-with-error
      
      × Getting requirements to build wheel did not run successfully.
      │ exit code: 1
      ╰─> See above for output.
      
      note: This error originates from a subprocess, and is likely not a problem with pip.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [10 lines of output]
      Checking for Rust toolchain....
      Running `maturin pep517 write-dist-info --metadata-directory /tmp/pip-modern-metadata-x_ri8ft9 --interpreter /tmp/tmp8vwrat2m/venv/bin/python`
      error: failed to parse lock file at: /tmp/pip-install-1_8ugwkm/orjson_d4b44df65a7747fcba090bde91edbfd7/Cargo.lock
      
      Caused by:
        lock file version `4` was found, but this version of Cargo does not understand this lock file, perhaps Cargo needs to be updated?
      💥 maturin failed
        Caused by: Cargo metadata failed. Does your crate compile with `cargo build`?
        Caused by: `cargo metadata` exited with an error:
      Error running maturin: Command '['maturin', 'pep517', 'write-dist-info', '--metadata-directory', '/tmp/pip-modern-metadata-x_ri8ft9', '--interpreter', '/tmp/tmp8vwrat2m/venv/bin/python']' returned non-zero exit status 1.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

ERROR: Ignored the following versions that require a different python version: 0.7 Requires-Python >=3.6, <3.7; 0.8 Requires-Python >=3.6, <3.7
ERROR: Could not find a version that satisfies the requirement dataclasses==0.8 (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6)
ERROR: No matching distribution found for dataclasses==0.8

  error: subprocess-exited-with-error
  
  × Building wheel for msgspec (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [59 lines of output]
      /tmp/pip-build-env-osvmd_e8/overlay/lib/python3.13t/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
      !!
      
              ********************************************************************************
              Please consider removing the following classifiers in favor of a SPDX license expression:
      
              License :: OSI Approved :: BSD License
      
              See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
              ********************************************************************************
      
      !!
        self._finalize_license_expression()
      running bdist_wheel
      running build
      running build_py
      creating build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/__init__.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/_json_schema.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/_utils.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/_version.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/inspect.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/json.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/msgpack.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/structs.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/toml.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/yaml.py -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/__init__.pyi -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/json.pyi -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/msgpack.pyi -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/structs.pyi -> build/lib.linux-x86_64-cpython-313t/msgspec
      copying msgspec/py.typed -> build/lib.linux-x86_64-cpython-313t/msgspec
      UPDATING build/lib.linux-x86_64-cpython-313t/msgspec/_version.py
      set build/lib.linux-x86_64-cpython-313t/msgspec/_version.py to '0.19.0'
      running build_ext
      building 'msgspec._core' extension
      creating build/temp.linux-x86_64-cpython-313t/msgspec
      cc -pthread -fno-strict-overflow -Wsign-compare -Wunreachable-code -DNDEBUG -g -O3 -Wall -fPIC -fPIC -I/tmp/tmpz5k_xrym/venv/include -I/root/.local/share/uv/python/cpython-3.13.3+freethreaded-linux-x86_64-gnu/include/python3.13t -c msgspec/_core.c -o build/temp.linux-x86_64-cpython-313t/msgspec/_core.o
      msgspec/_core.c:2150:5: warning: braces around scalar initializer
       2150 |     { MS_IMMORTAL_INITIAL_REFCNT },
            |     ^
      msgspec/_core.c:2150:5: note: (near initialization for ‘_NoDefault_Object.ob_tid’)
      msgspec/_core.c:2151:5: warning: initialization of ‘short unsigned int’ from ‘PyTypeObject *’ {aka ‘struct _typeobject *’} makes integer from pointer without a cast [-Wint-conversion]
       2151 |     &NoDefault_Type
            |     ^
      msgspec/_core.c:2151:5: note: (near initialization for ‘_NoDefault_Object._padding’)
      msgspec/_core.c:2151:5: error: initializer element is not computable at load time
      msgspec/_core.c:2151:5: note: (near initialization for ‘_NoDefault_Object._padding’)
      msgspec/_core.c:2254:5: warning: braces around scalar initializer
       2254 |     { MS_IMMORTAL_INITIAL_REFCNT },
            |     ^
      msgspec/_core.c:2254:5: note: (near initialization for ‘_Unset_Object.ob_tid’)
      msgspec/_core.c:2255:5: warning: initialization of ‘short unsigned int’ from ‘PyTypeObject *’ {aka ‘struct _typeobject *’} makes integer from pointer without a cast [-Wint-conversion]
       2255 |     &Unset_Type
            |     ^
      msgspec/_core.c:2255:5: note: (near initialization for ‘_Unset_Object._padding’)
      msgspec/_core.c:2255:5: error: initializer element is not computable at load time
      msgspec/_core.c:2255:5: note: (near initialization for ‘_Unset_Object._padding’)
      error: command '/usr/bin/cc' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for msgspec
ERROR: Failed to build installable wheels for some pyproject.toml based projects (msgspec)

  error: subprocess-exited-with-error
  
  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 1
  ╰─> [44 lines of output]
      Ignoring cffi: markers 'platform_python_implementation != "PyPy" and python_version == "3.8"' don't match your environment
      Collecting maturin<2,>=1.9.4
        Using cached maturin-1.9.4-py3-none-manylinux_2_12_x86_64.manylinux2010_x86_64.musllinux_1_1_x86_64.whl.metadata (16 kB)
      Collecting cffi>=2.0.0
        Using cached cffi-2.0.0.tar.gz (523 kB)
        Installing build dependencies: started
        Installing build dependencies: finished with status 'done'
        Getting requirements to build wheel: started
        Getting requirements to build wheel: finished with status 'error'
        error: subprocess-exited-with-error
      
        × Getting requirements to build wheel did not run successfully.
        │ exit code: 1
        ╰─> [20 lines of output]
            Traceback (most recent call last):
              File "/tmp/tmpa3yw0g_7/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
                main()
                ~~~~^^
              File "/tmp/tmpa3yw0g_7/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
                json_out["return_val"] = hook(**hook_input["kwargs"])
                                         ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/tmpa3yw0g_7/venv/lib/python3.13t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
                return hook(config_settings)
              File "/tmp/pip-build-env-dpnkyhzh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
                return self._get_build_requires(config_settings, requirements=[])
                       ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
              File "/tmp/pip-build-env-dpnkyhzh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
                self.run_setup()
                ~~~~~~~~~~~~~~^^
              File "/tmp/pip-build-env-dpnkyhzh/overlay/lib/python3.13t/site-packages/setuptools/build_meta.py", line 317, in run_setup
                exec(code, locals())
                ~~~~^^^^^^^^^^^^^^^^
              File "<string>", line 22, in <module>
            RuntimeError: CFFI does not support the free-threaded build of CPython 3.13. Upgrade to free-threaded 3.14 or newer to use CFFI with the free-threaded build.
            [end of output]
      
        note: This error originates from a subprocess, and is likely not a problem with pip.
      error: subprocess-exited-with-error
      
      × Getting requirements to build wheel did not run successfully.
      │ exit code: 1
      ╰─> See above for output.
      
      note: This error originates from a subprocess, and is likely not a problem with pip.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.