79 FTBFS packages on arm64 without patch
phyml_3:3.3.20250515-138d [B][L][T] 
tilix_1.9.6-610d [B][L][T] 
yuzu_0-1734+ds-760d [B][L][T]#1121087 - yuzu FTBFS on arm64: tests (SEGFAULT)
pysph_1.0~b2-243d [B][L][T]#1122067 - pysph: FTBFS with Python 3.14: Segmentation fault
hippomocks_5.0-2277d [B][L][T]#888883 - hippomocks FTBFS on arm64/armhf/mips*: test failure
#1047975 - hippomocks: Fails to build source after successful build
libapache2-mod-oauth2_4.0.0-12d [B][L][T]#1125720 - libapache2-mod-oauth2 FTBFS with liboauth2 2.2.0
btas_1.0.0-1.149d [B][L][T] 
prody_2.6.1+dfsg-134d [B][L][T] 
binutils_2.45.50.20260116-15h [B][L][T] 
ectrans_1.7.0-44d [B][L][T] 
lua-struct_0.3-296d [B][L][T] 
receptor_1.5.5-248d [B][L][T]#1109561 - receptor: flaky autopkgtest: panic: Fail in goroutine after TestTCPProxyServiceOutbound has completed
gvars3_0.0~git20220105194034.62f5a78-4.1278d [B][L][T]#1044885 - gvars3: Fails to build source after successful build
ldc_1:1.41.0-138d [B][L][T]#1010421 - gir-to-d: FTBFS with ldc 1.29
#1011739 - gir-to-d: FTBFS: LinkedHasMap.d:27: undefined reference to `_D6object__T8opEqualsTxC3gtd11GirFunctionQnTxQwZQBkFxQBexQBiZb'
#1016433 - FTBFS: undefined reference during linking
#1122608 - ldc ftbfs with LLVM 21
oci-seccomp-bpf-hook_1.2.11+ds-148d [B][L][T]#1105472 - oci-seccomp-bpf-hook: FTBFS with make --shuffle=reverse: install: cannot stat 'oci-seccomp-bpf-hook*.1': No such file or directory
#1121712 - oci-seccomp-bpf-hook: FTBFS: cannot find package "github.com/containers/common/pkg/seccomp"
rapmap_0.15.0+dfsg-5101d [B][L][T]#976588 - rapmap: FTBFS on arm64 (when trying to build arch:all)
rust-mach-o-sys_0.1.1-31443d [B][L][T]#953285 - rust-mach-o-sys fails on architectures with unsigned char
#976484 - rust-mach-o-sys: unsigned values cannot be negated
pandoc-sidenote_0.23.0-12d [B][L][T] 
pymupdf_1.25.4+ds1-43h [B][L][T] 
haxml_1:1.25.13-22d [B][L][T] 
openstructure_2.11.1-195d [B][L][T]#976491 - openstructure: FTBFS on arm64: E: Build killed with signal TERM after 150 minutes of inactivity
silver-platter_0.7.0-253d [B][L][T]#1125080 - silver-platter: FTBFS: test result: FAILED. 73 passed; 48 failed; 0 ignored; 0 measured; 0 filtered out
hlint_3.6.1-12d [B][L][T] 
sphde_1.4.0-5.11d [B][L][T]#1048093 - sphde: Fails to build source after successful build
#1125773 - sphde: FTBFS on arm64: TERM after 150 minutes of inactivity
agda_2.6.4.3-12d [B][L][T]#1043707 - agda: Fails to build source after successful build
mpqc_2.3.1-22415d [B][L][T]#1049570 - mpqc: Fails to build binary packages again after successful build
#1075293 - mpqc: ftbfs with GCC-14
cpptraj_5.1.0+dfsg-5119d [B][L][T]#1035833 - cpptraj: FTBFS on \!amd64
#1091156 - cpptraj: FTBFS on arm64: make[2]: *** [Makefile:662: summary] Error 4
gitit_0.15.1.2+dfsg-12d [B][L][T]#1023021 - gitit: FTBFS on mipsel
libmaus2_2.0.813+ds-5103d [B][L][T]#934619 - libmaus2 FTBFS (mostly 32bit): error: no matching function for call
#1069691 - libmaus2: FTBFS on arm64: what(): AutoArray failed to allocate 1398102 elements (11184816 bytes)
#1091144 - libmaus2: ftbfs on arm64 prevents building biobambam2
#1091568 - libmaus2: FTBFS on i386: ld: ./.libs/libmaus2.so: undefined reference to `libmaus2::posix::PosixFunctions::fstatSizeAndMode(int, long long&, unsigned char*)'
haskell-with-location_0.1.0-107d [B][L][T]#1125644 - haskell-with-location: FTBFS: Test suite spec: FAIL
tinyarray_1.2.5-126d [B][L][T]#976514 - tinyarray: FTBFS: dh_auto_test: error: pybuild --test --test-pytest -i python{version} -p "3.8 3.9" --test-pytest --test-args=../../../test_tinyarray.py returned exit code 13
#1017051 - tinyarray: FTBFS on i386
taffybar_4.0.2-12d [B][L][T] 
bwa-mem2_2.2.1-1276d [B][L][T] 
cypari2_2.1.4-1463d [B][L][T]#1081687 - Times out building on arm64
drawterm_20240821-0.17d [B][L][T] 
gforth_0.7.3+dfsg-9278d [B][L][T]#1067376 - gforth: FTBFS: make[1]: *** [Makefile:655: build-libcc-named] Error 1
pyemd_0.5.1.54.g802fa86-2418d [B][L][T]#1080277 - FTBFS with setuptools >= 72: error: invalid command 'test'
llvm-toolchain-14_1:14.0.6-2022d [B][L][T]#1068840 - llvm-toolchain-14: FTBFS on mips64el: /<>/compiler-rt/lib/builtins/clear_cache.c:97:3: error: implicit declaration of function 'syscall' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
#1076412 - FTBFS with OCaml 5.2.0 (Uses C functions without caml_ prefix)
#1113234 - llvm-toolchain-14: FTBFS with CMake 4
pydevd_3.4.1+ds-143d [B][L][T]#1122040 - pydevd: FTBFS with Python 3.14: test failures
broker_1.4.0+ds1-1324d [B][L][T]#1037597 - broker: ftbfs with GCC-13
#1112758 - broker: FTBFS with CMake 4
camitk_5.2.0-594d [B][L][T] 
cython-legacy_0.29.37-2310d [B][L][T]#1078460 - cython-legacy: Keep out of testing
denemo_2.6.39-0.3133d [B][L][T]#1106646 - Data Loss on load with libxml v1.3+
#1115689 - denemo: FTBFS: source/proof.c:282:28: error: conflicting types for ‘ev_document_annotations_get_annotations’; have ‘EvMappingList *(void)’ {aka ‘struct _EvMappingList *(void)’}
ecere-sdk_0.44.15-11576d [B][L][T]#898832 - ecere-sdk: FTBFS on i386: /usr/lib/gcc/i686-linux-gnu/7/include/stddef.h:435:78: error: syntax error
#995050 - ecere-sdk FTBFS with gcc 10
gpyfft_0.7.1-343d [B][L][T]#1120241 - gpyfft: FTBFS: AttributeError: module 'gpyfft.gpyfftlib' has no attribute 'CLFFT_DOUBLE'
haskell-tar_0.6.4.0-113d [B][L][T]#1124978 - haskell-tar: FTBFS: Encountered missing or private dependencies: directory-ospath-streaming >=0.2.1 && <0.3, file-io <0.2
lintian-brush_0.16239d [B][L][T]#1114184 - lintian-brush: FTBFS: failed to select a version for the requirement `pyo3 = ">=0.22, <0.24"`
#1115809 - lintian-brush: FTBFS: failed to select a version for the requirement `pyo3 = ">=0.22, <0.24"`
pocketsphinx-python_1:0.1.15-7324d [B][L][T]#1088764 - pocketsphinx-python: autopkgtest failure with Python 3.13
pygccjit_0.4-13428d [B][L][T]#1082097 - pygccjit FTBFS with Python 3.13
pymatgen_2025.10.7+dfsg1-134d [B][L][T]#1118027 - pymatgen: test_packmol test_atoms_constraints fails on various architectures
python-cogent_2024.5.7a1+dfsg-3276d [B][L][T]#1090269 - python-cogent: FTBFS: E ImportError: Numba could not be imported.
tiledarray_1.0.0-1131d [B][L][T]#1087560 - tiledarray: FTBFS: missing cstdint include
xaw3d_1.5+F-32h [B][L][T]#1098120 - xaw3d: ftbfs with GCC-15
xemacs21_21.4.24-12367d [B][L][T]#1075659 - xemacs21: ftbfs with GCC-14
abseil_20240722.0-42d [B][L][T] 
ccls_0.20241108-138d [B][L][T]#1068055 - ccls: FTBFS on armel (undefined reference to symbol '__atomic_load_8@@LIBATOMIC_1.0')
#1068056 - ccls: FTBFS on armhf,i386 (test_response failures)
#1122607 - ccls ftbfs with LLVM 21
code-saturne_6.0.2-280d [B][L][T]#1078336 - code-saturne: FTBFS with GCC 14: error: assignment to 'const cs_real_t *' {aka 'const double *'} from incompatible pointer type 'float *'
cpm_0.32-1.663d [B][L][T]#1106610 - cpm ftbfs with libxml 2.14.x from experimental
cpp-httplib_0.18.7-12d [B][L][T]#1041249 - cpp-httplib: FTBFS on s390x, armhf due to flaky tests
frama-c_20220511-manganese-522d [B][L][T]#1044539 - frama-c: Fails to build source after successful build
#1093102 - frama-c: FTBFS with OCaml 5.3.0 (syntax error due to new "effect" keyword)
globjects_1.1.0-3382d [B][L][T]#1090229 - globjects: FTBFS: error: ‘gl::BufferAccessMask’ has not been declared
#1112960 - globjects: FTBFS with CMake 4
gnucap-python_0.0.2-1.2355d [B][L][T]#1067335 - gnucap-python: FTBFS: _gnucap_swig.cxx:4535:10: fatal error: numpy/arrayobject.h: No such file or directory
keepassxc_2.7.10+dfsg1-248d [B][L][T]#1120396 - keepassxc FTBFS with botan3/3.10.0
libhdate_1.6.02-2.12d [B][L][T]#1045497 - libhdate: Fails to build source after successful build
#1102875 - libhdate: add perl-xs-dev to Build-Depends
liboping_1.10.0-52d [B][L][T]#1102879 - liboping: add perl-xs-dev to Build-Depends
libvirt-php_0.5.8-7153d [B][L][T]#1106642 - libvirt-php ftbfs with libxml 2.14.x from experimental
linphone_5.3.105-62d [B][L][T]#1119745 - linphone: FTBFS: /<>/src/db/main-db.cpp:1530:58: error: use of deleted function 'soci::details::use_container soci::use(T&&, const std::string&) [with T = long long int; std::string = std::__cxx11::basic_string]'
mercurial_7.1.1-146d [B][L][T]#1052811 - mercurial: test-http-bad-server.t intermittent failure
#1069407 - mercurial: FTBFS on arm64: dh_auto_test: error: make -j4 check PYTHON=python3 "TESTFLAGS=--verbose --timeout 1800 --jobs 4 --blacklist /<>/debian/mercurial.test_blacklist" returned exit code 2
#1073270 - mercurial: FTBFS on hppa - test-bundle.t output changed
#1074678 - mercurial: FTBFS: dh_auto_test: error: make -j8 check PYTHON=python3 "TESTFLAGS=--verbose --timeout 1800 --jobs 8 --blacklist /<>/debian/mercurial.test_blacklist" returned exit code 2
#1121613 - mercurial: FTBFS with Python 3.14
python-cramjam_2.7.0.1+ds1-2379d [B][L][T]#1061310 - python-cramjam FTBFS with pyo3 0.20
python-line-profiler_5.0.0-144d [B][L][T]#1122001 - python-line-profiler: FTBFS with Python 3.14: multiple test failures
python-mbedtls_2.10.1-1429d [B][L][T]#1075872 - python-mbedtls: FTBFS with MbedTLS 3.6
ros-robot-state-publisher_1.15.2-51d [B][L][T]#1125761 - ros-robot-state-publisher FTBFS with CMake 4
ruby-gd_0.8.0-8340d [B][L][T]#1075461 - ruby-gd: ftbfs with GCC-14
ruby-mmap2_2.2.9-1340d [B][L][T]#1075466 - ruby-mmap2: ftbfs with GCC-14
s2geometry_0.10.0-6.1622d [B][L][T]#1059228 - build system hard-codes -std=c++11
sphinxbase_0.8+5prealpha+1-2147d [B][L][T]#1097917 - sphinxbase: ftbfs with GCC-15
stdgpu_1.3.0+git20220507.32e0517-649d [B][L][T]#1119033 - stdgpu: FTBFS with libamdhip64-dev 6.4.3
syslog-ng_4.8.1-720d [B][L][T]#1124213 - syslog-ng: FTBFS: error: ISO C90 forbids mixed declarations and code
xpra_3.1.5+dfsg1-0.2120d [B][L][T]#1067627 - FTBFS: error: comparison of integer expressions of different signedness: ‘long unsigned int’ and ‘long int’
#1072463 - xpra: FTBFS with ffmpeg 7.0: xpra/codecs/enc_ffmpeg/encoder.c:11208:115: error: passing argument 6 of ‘avio_alloc_context’ from incompatible pointer type [-Werror=incompatible-pointer-types]
8 FTBFS packages on arm64 with a patch pending
deal.ii_9.7.1-29d [B][L][T]#1120656 - deal.ii: FTBFS: Fix relocation R_LARCH_B26 overflow on loong64
highlight_4.10-12d [B][L][T]#1102794 - highlight: add perl-xs-dev to Build-Depends
libprelude_5.2.0-5.6359d [B][L][T]#1081473 - FTBFS with Python 3.13
libspf2_1.2.10-8.32d [B][L][T]#1102792 - libspf2: add perl-xs-dev to Build-Depends
numba_0.61.2+dfsg-244d [B][L][T]#1119030 - numba: needs update for Python 3.14
python-casacore_3.7.1-243d [B][L][T]#1122028 - python-casacore: FTBFS with Python 3.14
ros-laser-geometry_1.6.7-51d [B][L][T]#1125763 - ros-laser-geometry FTBFS with CMake 4
sks_1.1.6+git20210302.c3ba6d5a-4.1528d [B][L][T]#1073911 - FTBFS with OCaml 5.2.0 (Uses C functions without caml_ prefix)