CI: test with GCC 16 by jmcarcell · Pull Request #998 · AIDASoft/podio

jmcarcell · 2026-08-03T13:22:08Z

BEGINRELEASENOTES

Add GCC 16 coverage in the CI test matrix.

ENDRELEASENOTES

tmadlener · 2026-08-14T14:06:25Z

@arnavdham @veprbl it looks like we are hitting a warning inside an arrow header. Could you take a look and see whether this is something that is caused on our end, or whether this is something we would have to suppress for now to have working CI with gcc16?

Relevant CI output:

From this run

 [182/847] Building CXX object src/CMakeFiles/podioArrow.dir/ArrowFrameConverter.cc.o
    FAILED: [code=1] src/CMakeFiles/podioArrow.dir/ArrowFrameConverter.cc.o 
    ccache /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/bin/g++ -DPODIO_ENABLE_ARROW=1 -DpodioArrow_EXPORTS -I/home/runner/work/podio/podio/include -Weffc++ -pedantic -Wextra -Wall -fdiagnostics-color=auto -Wdeprecated -Wno-long-long -Wshadow  -fdiagnostics-color=always -Werror -Wno-error=deprecated-declarations         -O2 -g -DNDEBUG -std=c++20 -fPIC -MD -MT src/CMakeFiles/podioArrow.dir/ArrowFrameConverter.cc.o -MF src/CMakeFiles/podioArrow.dir/ArrowFrameConverter.cc.o.d -o src/CMakeFiles/podioArrow.dir/ArrowFrameConverter.cc.o -c /home/runner/work/podio/podio/src/ArrowFrameConverter.cc
    In file included from /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_base.h:30,
                     from /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_adaptive.h:25,
                     from /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/builder.h:22,
                     from /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/api.h:26,
                     from /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:9:
    In member function 'int64_t arrow::BufferBuilder::length() const',
        inlined from 'int64_t arrow::TypedBufferBuilder<T, typename std::enable_if<(std::is_arithmetic<_Tp>::value || std::is_standard_layout<_Tp>::value)>::type>::length() const [with T = signed char]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:324:56,
        inlined from 'virtual int64_t arrow::BasicUnionBuilder::length() const' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_union.h:67:65,
        inlined from 'arrow::Status arrow::ArrayBuilder::Reserve(int64_t)' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_base.h:140:31,
        inlined from 'arrow::Status arrow::NumericBuilder<TypeClass>::Append(value_type) [with T = arrow::DoubleType]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_primitive.h:104:5,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = double; BuilderType = arrow::NumericBuilder<arrow::DoubleType>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:41:44,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:53:72:
    /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:205:35: error: array subscript 4 is outside array bounds of 'std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::DoubleType>, std::allocator<void>, __gnu_cxx::_S_atomic> [1]' [-Werror=array-bounds=]
      205 |   int64_t length() const { return size_; }
          |                                   ^~~~~
    In file included from /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/x86_64-pc-linux-gnu/bits/c++allocator.h:33,
                     from /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocator.h:46,
                     from /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/memory:67,
                     from /home/runner/work/podio/podio/include/podio/utilities/ArrowFrameConverter.h:4,
                     from /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:1:
    In member function 'constexpr _Tp* std::__new_allocator<_Tp>::allocate(size_type, const void*) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::DoubleType>, std::allocator<void>, __gnu_cxx::_S_atomic>]',
        inlined from 'constexpr _Tp* std::allocator< <template-parameter-1-1> >::allocate(std::size_t) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::DoubleType>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocator.h:206:40,
        inlined from 'static constexpr _Tp* std::allocator_traits<std::allocator<_Up> >::allocate(allocator_type&, size_type) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::DoubleType>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/alloc_traits.h:638:28,
        inlined from 'std::__allocated_ptr<_Alloc> std::__allocate_guarded(_Alloc&) [with _Alloc = allocator<_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::DoubleType>, allocator<void>, __gnu_cxx::_S_atomic> >]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocated_ptr.h:103:69,
        inlined from 'std::__shared_count<_Lp>::__shared_count(_Tp*&, std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::DoubleType>; _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1034:9,
        inlined from 'std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::DoubleType>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1812:14,
        inlined from 'std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::DoubleType>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:463:59,
        inlined from 'std::shared_ptr<std::_NonArray<_Tp> > std::make_shared(_Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::DoubleType>; _Args = {arrow::MemoryPool*&}]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:1066:39,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = double; BuilderType = arrow::NumericBuilder<arrow::DoubleType>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:29:10,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:53:72:
    /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/new_allocator.h:162:75: note: at offset 272 into object of size 232 allocated by 'operator new'
      162 |           return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp)));
          |                                                                           ^
    In member function 'int64_t arrow::BufferBuilder::length() const',
        inlined from 'int64_t arrow::TypedBufferBuilder<T, typename std::enable_if<(std::is_arithmetic<_Tp>::value || std::is_standard_layout<_Tp>::value)>::type>::length() const [with T = signed char]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:324:56,
        inlined from 'virtual int64_t arrow::BasicUnionBuilder::length() const' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_union.h:67:65,
        inlined from 'arrow::Status arrow::ArrayBuilder::Reserve(int64_t)' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_base.h:140:31,
        inlined from 'arrow::Status arrow::NumericBuilder<TypeClass>::Append(value_type) [with T = arrow::FloatType]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_primitive.h:104:5,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = float; BuilderType = arrow::NumericBuilder<arrow::FloatType>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:41:44,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:52:69:
    /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:205:35: error: array subscript 4 is outside array bounds of 'std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::FloatType>, std::allocator<void>, __gnu_cxx::_S_atomic> [1]' [-Werror=array-bounds=]
      205 |   int64_t length() const { return size_; }
          |                                   ^~~~~
    In member function 'constexpr _Tp* std::__new_allocator<_Tp>::allocate(size_type, const void*) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::FloatType>, std::allocator<void>, __gnu_cxx::_S_atomic>]',
        inlined from 'constexpr _Tp* std::allocator< <template-parameter-1-1> >::allocate(std::size_t) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::FloatType>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocator.h:206:40,
        inlined from 'static constexpr _Tp* std::allocator_traits<std::allocator<_Up> >::allocate(allocator_type&, size_type) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::FloatType>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/alloc_traits.h:638:28,
        inlined from 'std::__allocated_ptr<_Alloc> std::__allocate_guarded(_Alloc&) [with _Alloc = allocator<_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::FloatType>, allocator<void>, __gnu_cxx::_S_atomic> >]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocated_ptr.h:103:69,
        inlined from 'std::__shared_count<_Lp>::__shared_count(_Tp*&, std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::FloatType>; _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1034:9,
        inlined from 'std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::FloatType>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1812:14,
        inlined from 'std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::FloatType>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:463:59,
        inlined from 'std::shared_ptr<std::_NonArray<_Tp> > std::make_shared(_Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::FloatType>; _Args = {arrow::MemoryPool*&}]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:1066:39,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = float; BuilderType = arrow::NumericBuilder<arrow::FloatType>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:29:10,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:52:69:
    /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/new_allocator.h:162:75: note: at offset 272 into object of size 232 allocated by 'operator new'
      162 |           return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp)));
          |                                                                           ^
    In member function 'int64_t arrow::BufferBuilder::length() const',
        inlined from 'int64_t arrow::TypedBufferBuilder<T, typename std::enable_if<(std::is_arithmetic<_Tp>::value || std::is_standard_layout<_Tp>::value)>::type>::length() const [with T = signed char]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:324:56,
        inlined from 'virtual int64_t arrow::BasicUnionBuilder::length() const' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_union.h:67:65,
        inlined from 'arrow::Status arrow::ArrayBuilder::Reserve(int64_t)' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_base.h:140:31,
        inlined from 'arrow::Status arrow::NumericBuilder<TypeClass>::Append(value_type) [with T = arrow::Int32Type]' at /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/array/builder_primitive.h:104:5,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = int; BuilderType = arrow::NumericBuilder<arrow::Int32Type>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:41:44,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:51:65:
    /cvmfs/sft-nightlies.cern.ch/lcg/views/dev4/Thu/x86_64-el9-gcc16-opt/include/arrow/buffer_builder.h:205:35: error: array subscript 4 is outside array bounds of 'std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::Int32Type>, std::allocator<void>, __gnu_cxx::_S_atomic> [1]' [-Werror=array-bounds=]
      205 |   int64_t length() const { return size_; }
          |                                   ^~~~~
    In member function 'constexpr _Tp* std::__new_allocator<_Tp>::allocate(size_type, const void*) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::Int32Type>, std::allocator<void>, __gnu_cxx::_S_atomic>]',
        inlined from 'constexpr _Tp* std::allocator< <template-parameter-1-1> >::allocate(std::size_t) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::Int32Type>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocator.h:206:40,
        inlined from 'static constexpr _Tp* std::allocator_traits<std::allocator<_Up> >::allocate(allocator_type&, size_type) [with _Tp = std::_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::Int32Type>, std::allocator<void>, __gnu_cxx::_S_atomic>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/alloc_traits.h:638:28,
        inlined from 'std::__allocated_ptr<_Alloc> std::__allocate_guarded(_Alloc&) [with _Alloc = allocator<_Sp_counted_ptr_inplace<arrow::NumericBuilder<arrow::Int32Type>, allocator<void>, __gnu_cxx::_S_atomic> >]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/allocated_ptr.h:103:69,
        inlined from 'std::__shared_count<_Lp>::__shared_count(_Tp*&, std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::Int32Type>; _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1034:9,
        inlined from 'std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::Int32Type>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr_base.h:1812:14,
        inlined from 'std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {arrow::MemoryPool*&}; _Tp = arrow::NumericBuilder<arrow::Int32Type>]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:463:59,
        inlined from 'std::shared_ptr<std::_NonArray<_Tp> > std::make_shared(_Args&& ...) [with _Tp = arrow::NumericBuilder<arrow::Int32Type>; _Args = {arrow::MemoryPool*&}]' at /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/shared_ptr.h:1066:39,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::buildParamMap(const podio::GenericParameters&) [with T = int; BuilderType = arrow::NumericBuilder<arrow::Int32Type>]' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:29:10,
        inlined from 'std::shared_ptr<arrow::Array> podio::{anonymous}::convertParameters(const podio::GenericParameters&)' at /home/runner/work/podio/podio/src/ArrowFrameConverter.cc:51:65:
    /cvmfs/sft.cern.ch/lcg/releases/gcc/16.1.0-43042/x86_64-el9/include/c++/16.1.0/bits/new_allocator.h:162:75: note: at offset 272 into object of size 232 allocated by 'operator new'
      162 |           return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp)));
          |                                                                           ^
    cc1plus: all warnings being treated as errors

arnavdham · 2026-08-17T13:22:20Z

@arnavdham @veprbl it looks like we are hitting a warning inside an arrow header. Could you take a look and see whether this is something that is caused on our end, or whether this is something we would have to suppress for now to have working CI with gcc16?

Relevant CI output:

I think this has to be suppressed. No clear reason according to me why this should be giving a warning

tmadlener · 2026-08-24T09:40:26Z

Looks like having arrow/api.h in there let's gcc speculatively devirtualize (wrongly) which triggers a warning. This cannot be suppressed via compiler flags (other than -fno-devirtualize-speculatively or -fno-devirtualize). The solution here seems to be to just explicitly include arrow headers and omti the api.h header instead.

tmadlener · 2026-08-24T13:01:24Z

Unless there are objections, I will merge this later today.

jmcarcell · 2026-08-24T14:22:31Z

I'll update arrow in the LCG stacks to 25 for tomorrow; I don't get the warnings locally with that and GCC 16 so it may do something (maybe not).

tmadlener · 2026-08-24T14:52:06Z

OK. I will wait then until those appear tomorrow.

jmcarcell · 2026-08-25T08:44:03Z

Didn't get in for today since there were a few changes of the recipe... https://gitlab.cern.ch/sft/stacks/lcgcmake/-/merge_requests/4307. It should be there tomorrow

GCC16 starts to speculatively devirtualize (wrongly!) if all of the api header is available which results in warnings that are not suppressable with compiler flags otherwise.

This reverts commit d11111c.

jmcarcell · 2026-08-26T08:47:42Z

It's possible that now reverting d73d1dd works; probably it's better than adding all the headers if that's the intended way?

tmadlener · 2026-08-26T08:52:01Z

I don't know enough about arrow to judge what's the intended way, but if gcc keeps wrongly speculatively devirtualizing we at least know the solution. Let's see what the build says.

tmadlener · 2026-08-26T09:40:15Z

Doesn't seem to like it: https://github.com/AIDASoft/podio/actions/runs/32949414659/job/98117300290?pr=998#step:5:799

This reverts commit d73d1dd.

jmcarcell force-pushed the ci/add-gcc16 branch from 3dc7d95 to 165c848 Compare August 3, 2026 13:24

tmadlener force-pushed the ci/add-gcc16 branch from 165c848 to 263ed50 Compare August 13, 2026 14:38

tmadlener force-pushed the ci/add-gcc16 branch from 263ed50 to 7b384b9 Compare August 24, 2026 09:37

tmadlener force-pushed the ci/add-gcc16 branch from 7b384b9 to bda1448 Compare August 24, 2026 13:00

jmcarcell and others added 2 commits August 26, 2026 10:17

CI: test with GCC 16

f421f4c

Include arrow headers explicitly to fix warning

d11111c

GCC16 starts to speculatively devirtualize (wrongly!) if all of the api header is available which results in warnings that are not suppressable with compiler flags otherwise.

tmadlener force-pushed the ci/add-gcc16 branch from bda1448 to d11111c Compare August 26, 2026 08:17

tmadlener enabled auto-merge (squash) August 26, 2026 08:17

tmadlener previously approved these changes Aug 26, 2026

View reviewed changes

Revert "Include arrow headers explicitly to fix warning"

d73d1dd

This reverts commit d11111c.

jmcarcell dismissed tmadlener’s stale review via d73d1dd August 26, 2026 08:45

Reapply "Include arrow headers explicitly to fix warning"

8c44c7a

This reverts commit d73d1dd.

tmadlener disabled auto-merge August 26, 2026 11:23

tmadlener merged commit a6edb10 into AIDASoft:master Aug 26, 2026
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CI: test with GCC 16 - #998

CI: test with GCC 16#998
tmadlener merged 4 commits into
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jmcarcell:ci/add-gcc16

jmcarcell commented Aug 3, 2026 •

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tmadlener commented Aug 24, 2026 •

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jmcarcell commented Aug 3, 2026 •

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tmadlener commented Aug 24, 2026 •

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