qt5-qtwebengine @5.15.16_2 : converts to incompatible function type on sequoia

[m0nt0 (Pietro Montorfano)]

while installing openconect-sso qt-webengine is a dependency. The build fails on sequoia

--->  Building qt5-qtwebengine
Error: Failed to build qt5-qtwebengine: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_aqua_qt5/qt5-qtwebengine/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port openconnect-sso failed

the error seems to be

:info:build ../../3rdparty/chromium/third_party/harfbuzz-ng/src/src/hb-ft.cc:759:73: error: cast from 'void (*)(FT_Face)' (aka 'void (*)(FT_FaceRec_ *)') to 'FT_Generic_Finalizer' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
:info:build   759 |   if (unlikely (!ft_face->generic.data || ft_face->generic.finalizer != (FT_Generic_Finalizer) hb_ft_face_finalize))
:info:build       |                                                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build ../../3rdparty/chromium/third_party/harfbuzz-ng/src/src/hb.hh:234:46: note: expanded from macro 'unlikely'
:info:build   234 | #define unlikely(expr) (__builtin_expect (!!(expr), 0))
:info:build       |                                              ^~~~
:info:build ../../3rdparty/chromium/third_party/harfbuzz-ng/src/src/hb-ft.cc:765:34: error: cast from 'void (*)(FT_Face)' (aka 'void (*)(FT_FaceRec_ *)') to 'FT_Generic_Finalizer' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
:info:build   765 |     ft_face->generic.finalizer = (FT_Generic_Finalizer) hb_ft_face_finalize;
:info:build       |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build ../../3rdparty/chromium/third_party/harfbuzz-ng/src/src/hb-ft.cc:1035:32: error: cast from 'void (*)(FT_Face)' (aka 'void (*)(FT_FaceRec_ *)') to 'FT_Generic_Finalizer' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
:info:build  1035 |   ft_face->generic.finalizer = (FT_Generic_Finalizer) _release_blob;
:info:build       |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:info:build 3 errors generated.

standard macport installation

[m0nt0 (Pietro Montorfano)]

build log