python-greenlet fails to build with Python 3.14.0a7. g++ -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fPIC -I/usr/include/python3.14 -c src/greenlet/greenlet.cpp -o build/temp.linux-x86_64-cpython-314/src/greenlet/greenlet.o In file included from src/greenlet/greenlet.cpp:31: src/greenlet/TGreenlet.cpp: In member function ‘void greenlet::Greenlet::expose_frames()’: src/greenlet/TGreenlet.cpp:626:29: error: aggregate ‘_PyInterpreterFrame iframe_copy’ has incomplete type and cannot be defined 626 | _PyInterpreterFrame iframe_copy; | ^~~~~~~~~~~ src/greenlet/TGreenlet.cpp:627:65: error: invalid application of ‘sizeof’ to incomplete type ‘_PyInterpreterFrame’ 627 | this->stack_state.copy_from_stack(&iframe_copy, iframe, sizeof(*iframe)); | ^~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:628:14: error: ‘_PyFrame_IsIncomplete’ was not declared in this scope 628 | if (!_PyFrame_IsIncomplete(&iframe_copy)) { | ^~~~~~~~~~~~~~~~~~~~~ In file included from /usr/include/python3.14/Python.h:19, from src/greenlet/greenlet.cpp:16: src/greenlet/TGreenlet.cpp:635:41: error: ‘FRAME_OWNED_BY_CSTACK’ was not declared in this scope 635 | assert(iframe_copy.owner != FRAME_OWNED_BY_CSTACK); | ^~~~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:654:24: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 654 | if (!iframe->frame_obj) { | ^~ In file included from /usr/include/python3.14/pyframe.h:19, from /usr/include/python3.14/Python.h:104: /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:656:37: error: aggregate ‘_PyInterpreterFrame dummy_iframe’ has incomplete type and cannot be defined 656 | _PyInterpreterFrame dummy_iframe; | ^~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:661:38: error: ‘FRAME_OWNED_BY_GENERATOR’ was not declared in this scope 661 | dummy_iframe.owner = FRAME_OWNED_BY_GENERATOR; | ^~~~~~~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:667:30: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 667 | assert(iframe->frame_obj); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:682:26: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 682 | assert(iframe->owner == FRAME_OWNED_BY_THREAD | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:682:37: error: ‘FRAME_OWNED_BY_THREAD’ was not declared in this scope 682 | assert(iframe->owner == FRAME_OWNED_BY_THREAD | ^~~~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:683:29: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 683 | || iframe->owner == FRAME_OWNED_BY_GENERATOR); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:683:40: error: ‘FRAME_OWNED_BY_GENERATOR’ was not declared in this scope 683 | || iframe->owner == FRAME_OWNED_BY_GENERATOR); | ^~~~~~~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:685:44: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 685 | assert(last_complete_iframe->frame_obj); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:686:45: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 686 | memcpy(&last_complete_iframe->frame_obj->_f_frame_data[0], | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:687:45: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 687 | &last_complete_iframe->previous, sizeof(void *)); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:688:37: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 688 | last_complete_iframe->previous = iframe; | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:704:36: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 704 | assert(last_complete_iframe->frame_obj); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:705:37: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 705 | memcpy(&last_complete_iframe->frame_obj->_f_frame_data[0], | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:706:37: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 706 | &last_complete_iframe->previous, sizeof(void *)); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TGreenlet.cpp:707:29: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 707 | last_complete_iframe->previous = nullptr; | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ In file included from src/greenlet/greenlet.cpp:36: src/greenlet/TPythonState.cpp: In member function ‘void greenlet::PythonState::unexpose_frames()’: src/greenlet/TPythonState.cpp:179:51: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 179 | _PyInterpreterFrame *prev_exposed = iframe->previous; | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TPythonState.cpp:180:22: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 180 | assert(iframe->frame_obj); | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TPythonState.cpp:181:23: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 181 | memcpy(&iframe->previous, &iframe->frame_obj->_f_frame_data[0], | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ src/greenlet/TPythonState.cpp:181:42: error: invalid use of incomplete type ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 181 | memcpy(&iframe->previous, &iframe->frame_obj->_f_frame_data[0], | ^~ /usr/include/python3.14/cpython/pyframe.h:25:8: note: forward declaration of ‘_PyInterpreterFrame’ {aka ‘struct _PyInterpreterFrame’} 25 | struct _PyInterpreterFrame; | ^~~~~~~~~~~~~~~~~~~ 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_64/08899319-python-greenlet/ For all our attempts to build python-greenlet with Python 3.14, see: https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-greenlet/ 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.
https://src.fedoraproject.org/rpms/python-greenlet/pull-request/18
FEDORA-2025-17a3d488c8 (python-greenlet-3.1.1-3.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2025-17a3d488c8
FEDORA-2025-17a3d488c8 (python-greenlet-3.1.1-3.fc43) has been pushed to the Fedora 43 stable repository. If problem still persists, please make note of it in this bug report.