Bug#1143663: ipfixcol2: FTBFS: /usr/include/c++/16/bits/stl_tree.h:1402:72: error: static assertion failed: comparison object must be invocable with arguments of key_type

Santiago Vila <[email protected]> Wed, 05 Aug 2026 11:24:03 +0000
Newsgroups gmane.linux.debian.devel.bugs.rc
Message-ID <E1wrZj9-00Gxi7-14__44569.2167196953$1785929220$gmane$org@paradis.debian.org>
Package: src:ipfixcol2
Version: 2.8.0+20260519-2
Severity: serious
Tags: ftbfs forky sid

Dear maintainer:

During a rebuild of all packages in unstable, this package failed to build.

Below you will find the last part of the build log (probably the most
relevant part, but not necessarily). If required, the full build log
is available here:

https://people.debian.org/~sanvila/build-logs/202608/

About the archive rebuild: The build was made on virtual machines from AWS,
using sbuild and a reduced chroot with only build-essential packages.

If you cannot reproduce the bug please contact me privately, as I
am willing to provide ssh access to a virtual machine where the bug is
fully reproducible.

If this is really a bug in one of the build-depends, please use
reassign and add an affects on src:ipfixcol2, so that this is still
visible in the BTS web page for this package.

Thanks.

--------------------------------------------------------------------------------
[...]
/usr/include/c++/16/bits/stl_tree.h:2842:24:   required from [too-long-redacted] dsdump::lister::StorageRecord]’
 2842 |           __x = _M_key_compare(__k, _S_key(__x)) ? _S_left(__x) : _S_right(__x);
      |                 ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/16/bits/stl_tree.h:3242:15:   required from ‘std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::iterator std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_emplace_equal(_Args&& ...) [with _Args = {fds_drec&, fdsdump::Direction&, std::shared_ptr<fds_tsnapshot>&}; _Key = fdsdump::lister::StorageRecord; _Val = fdsdump::lister::StorageRecord; _KeyOfValue = std::_Identity<fdsdump::lister::StorageRecord>; _Compare = fdsdump::lister::StorageSorter; _Alloc = std::allocator<fdsdump::lister::StorageRecord>; iterator = std::_Rb_tree<fdsdump::lister::StorageRecord, fdsdump::lister::StorageRecord, std::_Identity<fdsdump::lister::StorageRecord>, fdsdump::lister::StorageSorter, std::allocator<fdsdump::lister::StorageRecord> >::iterator]’
 3242 |         auto __res = _M_get_insert_equal_pos(__z._M_key());
      |                      ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/16/bits/stl_multiset.h:483:32:   required from ‘std::multiset<_Key, _Compare, _Alloc>::iterator std::multiset<_Key, _Compare, _Alloc>::emplace(_Args&& ...) [with _Args = {fds_drec&, fdsdump::Direction&, std::shared_ptr<fds_tsnapshot>&}; _Key = fdsdump::lister::StorageRecord; _Compare = fdsdump::lister::StorageSorter; _Alloc = std::allocator<fdsdump::lister::StorageRecord>; iterator = std::_Rb_tree<fdsdump::lister::StorageRecord, fdsdump::lister::StorageRecord, std::_Identity<fdsdump::lister::StorageRecord>, fdsdump::lister::StorageSorter, std::allocator<fdsdump::lister::StorageRecord> >::const_iterator]’
  483 |         { return _M_t._M_emplace_equal(std::forward<_Args>(__args)...); }
      |                  ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorted.cpp:76:22:   required from here
   76 |     m_records.emplace(flow->rec, flow->dir, snapshot);
      |     ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/16/bits/stl_tree.h:1402:72: error: static assertion failed: comparison object must be invocable with arguments of key_type
 1402 |             __is_invocable<const _Compare&, const _Key&, const _Key&>::value,
      |                                                                        ^~~~~
  • ‘std::integral_constant<bool, false>::value’ evaluates to false
/usr/include/c++/16/bits/stl_tree.h:1406:40: error: no match for call to ‘(const fdsdump::lister::StorageSorter) (const fdsdump::lister::StorageRecord&, const fdsdump::lister::StorageRecord&)’
 1406 |           return _M_impl._M_key_compare(__k1, __k2);
      |                  ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
In file included from /<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorted.hpp:16:
  • there are 2 candidates
    /<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorter.hpp:24:7:
       24 | class StorageSorter {
          |       ^~~~~~~~~~~~~
    • candidate 1: ‘bool fdsdump::lister::StorageSorter::operator()(const fdsdump::lister::StorageRecord&, const fdsdump::lister::StorageRecord&)’ (near match)
      /<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorter.hpp:31:10:
         31 |     bool operator()(const StorageRecord &lhs, const StorageRecord &rhs);
            |          ^~~~~~~~
      • passing ‘const fdsdump::lister::StorageSorter*’ as ‘this’ argument discards qualifiers
    • candidate 2: ‘bool fdsdump::lister::StorageSorter::operator()(const fdsdump::Flow&, const fdsdump::Flow&)’
      /<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorter.hpp:32:10:
         32 |     bool operator()(const Flow &lhs, const Flow &rhs);
            |          ^~~~~~~~
      • no known conversion for argument 1 from ‘const fdsdump::lister::StorageRecord’ to ‘const fdsdump::Flow&’
        /<<PKGBUILDDIR>>/src/tools/fdsdump/src/lister/storageSorter.hpp:32:33:
           32 |     bool operator()(const Flow &lhs, const Flow &rhs);
              |                     ~~~~~~~~~~~~^~~
make[3]: *** [src/tools/fdsdump/src/lister/CMakeFiles/lister_obj.dir/build.make:194: src/tools/fdsdump/src/lister/CMakeFiles/lister_obj.dir/storageSorted.cpp.o] Error 1
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make[3]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
[ 96%] Built target aggregator_obj
make[2]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j2 INSTALL="install --strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:4: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2
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