[From nobody Tue Aug 11 08:37:08 2026 Received: (at maintonly) by bugs.debian.org; 13 Apr 2026 13:05:49 +0000 X-Spam-Checker-Version: SpamAssassin 4.0.1-bugs.debian.org_2005_01_02 (2024-03-25) on buxtehude.debian.org X-Spam-Level: X-Spam-Status: No, score=-116.7 required=4.0 tests=BAYES_00, BODY_INCLUDES_PACKAGE,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FROMDEVELOPER,FVGT_m_MULTI_ODD,HAS_PACKAGE, SPF_HELO_NONE,SPF_NONE,UNPARSEABLE_RELAY,USER_IN_DKIM_WELCOMELIST autolearn=ham autolearn_force=no version=4.0.1-bugs.debian.org_2005_01_02 X-Spam-Bayes: score:0.0000 Tokens: new, 54; hammy, 150; neutral, 259; spammy, 0. spammytokens: hammytokens:0.000-+--Hx-spam-relays-external:sk:stravin, 0.000-+--H*RT:sk:stravin, 0.000-+--Hx-spam-relays-external:311, 0.000-+--H*RT:311, 0.000-+--H*RT:108 Return-path: <ema@debian.org> Received: from stravinsky.debian.org ([2001:41b8:202:deb::311:108]:56730) by buxtehude.debian.org with esmtps (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from <ema@debian.org>) id 1wCGz7-002lTB-1F for maintonly@bugs.debian.org; Mon, 13 Apr 2026 13:05:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:Content-Transfer-Encoding:Content-Type :MIME-Version:Message-ID:Subject:To:From:Date:Reply-To:Cc:Content-ID: Content-Description:In-Reply-To:References; bh=59eEcGmHVjvM7v7uQ6qXtlLdCcxN6OeWhk0OG7miOJ4=; b=GMVl2bHu5c2S/JYiObgW4Z+2qo yuvBwCVBCas1pP2iDOWhnUYRIOBQq8qsk6scgSxxyxZB/VXhaIAERPoRwfmcdYipTYHLsdHM9VgTg 4PgHVPp4AVFnppIC56r9Q7xW3x8Miv+nJKRuRD4OMJ586NYX/NQJ3MzwpX2DW3MaTPFVkD1t2jneS M7k0T+mwW3qQqZQXwBWfz2E3wHftx23QmhGeej69LHXh5pL1HKA3Xz9fz0nbpN/FsD32OrmgwsWwc xZGvTa1eNzWbvJeSUtrV5rhq4imI0gwQWzHlimKP0lbW6rXLE8wPVM3c2OctKo+wfyvledZeZwMaE TB5tkqtw==; Received: from authenticated user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from <ema@debian.org>) id 1wCGz5-00CJQ3-2e for maintonly@bugs.debian.org; Mon, 13 Apr 2026 13:05:48 +0000 Date: Mon, 13 Apr 2026 15:05:47 +0200 From: Emanuele Rocca <ema@debian.org> To: maintonly@bugs.debian.org Subject: liblemon: ftbfs with GCC-16 Message-ID: <adzqKypeCSpqeEu7@ariel.home> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Debian-User: ema Delivered-To: maintonly@bugs.debian.org Package: src:liblemon Version: 1.3.1+dfsg-7 Severity: important Tags: sid forky ftbfs User: debian-gcc@lists.debian.org Usertags: ftbfs-gcc-16 Hi, liblemon fails to build in a test rebuild on at least amd64 and arm64 with gcc-16/g++-16, but builds properly with gcc-15/g++-15. The severity of this report will be raised before the forky release. The full build log can be found at: https://people.debian.org/~ema/gcc-16-rebuilds/output-1/liblemon_arm64.build.xz The last lines of the build log are at the end of this report. To build with GCC 16, either set CC=gcc-16 CXX=g++-16 explicitly, or install the gcc, g++, gfortran, ... packages from experimental. apt-get -t=experimental install g++ Common build failures include unused (but set) variables, array subscripts partly outside array bounds, and new/dropped symbols in Debian symbols files. For other C/C++ related build failures see the porting guide at http://gcc.gnu.org/gcc-16/porting_to.html Please only close this issue after double-checking that the package can be built correctly with GCC 16. Please do not reassign this bug to another package. If a fix in another package is required, then file a bug for the other package (or clone), and mark this bug as blocked by the bug in the other package. [...] /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:306:19: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::MaxMatching<lemon::SmartGraph>::Status>::Allocator’ {aka ‘class std::allocator<lemon::MaxMatching<lemon::SmartGraph>::Status>’} has no member named ‘construct’ 306 | allocator.construct(&(values[id]), Value()); | ~~~~~~~~~~^~~~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h: In instantiation of ‘void lemon::ArrayMap<_Graph, _Item, _Value>::add(const Key&) [with _Graph = lemon::GraphExtender<lemon::SmartGraphBase>; _Item = lemon::SmartGraphBase::Node; _Value = lemon::SmartGraphBase::Arc; Key = lemon::SmartGraphBase::Node]’: /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:208:18: required from here 208 | virtual void add(const Key& key) { | ^~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:221:23: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘construct’ 221 | allocator.construct(&(new_values[jd]), values[jd]); | ~~~~~~~~~~^~~~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:222:23: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘destroy’ 222 | allocator.destroy(&(values[jd])); | ~~~~~~~~~~^~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:229:17: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘construct’ 229 | allocator.construct(&(values[id]), Value()); | ~~~~~~~~~~^~~~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h: In instantiation of ‘void lemon::ArrayMap<_Graph, _Item, _Value>::add(const std::vector<_Item>&) [with _Graph = lemon::GraphExtender<lemon::SmartGraphBase>; _Item = lemon::SmartGraphBase::Node; _Value = lemon::SmartGraphBase::Arc]’: /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:236:18: required from here 236 | virtual void add(const std::vector<Key>& keys) { | ^~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:263:21: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘construct’ 263 | allocator.construct(&(new_values[id]), values[id]); | ~~~~~~~~~~^~~~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:264:21: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘destroy’ 264 | allocator.destroy(&(values[id])); | ~~~~~~~~~~^~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:272:19: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘construct’ 272 | allocator.construct(&(values[id]), Value()); | ~~~~~~~~~~^~~~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h: In instantiation of ‘void lemon::ArrayMap<_Graph, _Item, _Value>::erase(const Key&) [with _Graph = lemon::GraphExtender<lemon::SmartGraphBase>; _Item = lemon::SmartGraphBase::Node; _Value = lemon::SmartGraphBase::Arc; Key = lemon::SmartGraphBase::Node]’: /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:280:18: required from here 280 | virtual void erase(const Key& key) { | ^~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:282:17: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘destroy’ 282 | allocator.destroy(&(values[id])); | ~~~~~~~~~~^~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h: In instantiation of ‘void lemon::ArrayMap<_Graph, _Item, _Value>::erase(const std::vector<_Item>&) [with _Graph = lemon::GraphExtender<lemon::SmartGraphBase>; _Item = lemon::SmartGraphBase::Node; _Value = lemon::SmartGraphBase::Arc]’: /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:289:18: required from here 289 | virtual void erase(const std::vector<Key>& keys) { | ^~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:292:19: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘destroy’ 292 | allocator.destroy(&(values[id])); | ~~~~~~~~~~^~~~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h: In instantiation of ‘void lemon::ArrayMap<_Graph, _Item, _Value>::build() [with _Graph = lemon::GraphExtender<lemon::SmartGraphBase>; _Item = lemon::SmartGraphBase::Node; _Value = lemon::SmartGraphBase::Arc]’: /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:300:18: required from here 300 | virtual void build() { | ^~~~~ /build/reproducible-path/liblemon-1.3.1+dfsg/lemon/bits/array_map.h:306:19: error: ‘lemon::ArrayMap<lemon::GraphExtender<lemon::SmartGraphBase>, lemon::SmartGraphBase::Node, lemon::SmartGraphBase::Arc>::Allocator’ {aka ‘class std::allocator<lemon::SmartGraphBase::Arc>’} has no member named ‘construct’ 306 | allocator.construct(&(values[id]), Value()); | ~~~~~~~~~~^~~~~~~~~ make[4]: *** [tools/CMakeFiles/dimacs-solver.dir/build.make:82: tools/CMakeFiles/dimacs-solver.dir/dimacs-solver.cc.o] Error 1 make[4]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu' make[3]: *** [CMakeFiles/Makefile2:658: tools/CMakeFiles/dimacs-solver.dir/all] Error 2 [ 88%] Linking CXX executable dimacs-to-lgf cd /build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/tools && /usr/bin/cmake -E cmake_link_script CMakeFiles/dimacs-to-lgf.dir/link.txt --verbose=1 /usr/bin/c++ -g -O2 -ffile-prefix-map=/build/reproducible-path/liblemon-1.3.1+dfsg=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -W -Wunused -Wformat=2 -Wctor-dtor-privacy -Wnon-virtual-dtor -Wno-char-subscripts -Wwrite-strings -Wno-char-subscripts -Wreturn-type -Wcast-qual -Wcast-align -Wsign-promo -Woverloaded-virtual -fno-strict-aliasing -Wold-style-cast -Wno-unknown-pragmas -Wl,-z,relro -Wl,-z,now -Wl,--dependency-file=CMakeFiles/dimacs-to-lgf.dir/link.d "CMakeFiles/dimacs-to-lgf.dir/dimacs-to-lgf.cc.o" -o dimacs-to-lgf -L/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/lemon -Wl,-rpath,/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/lemon: ../lemon/liblemon.so.1.3.1 /usr/lib/aarch64-linux-gnu/libglpk.so make[4]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu' [ 88%] Built target dimacs-to-lgf [ 92%] Linking CXX executable lgf_demo cd /build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/demo && /usr/bin/cmake -E cmake_link_script CMakeFiles/lgf_demo.dir/link.txt --verbose=1 /usr/bin/c++ -g -O2 -ffile-prefix-map=/build/reproducible-path/liblemon-1.3.1+dfsg=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -W -Wunused -Wformat=2 -Wctor-dtor-privacy -Wnon-virtual-dtor -Wno-char-subscripts -Wwrite-strings -Wno-char-subscripts -Wreturn-type -Wcast-qual -Wcast-align -Wsign-promo -Woverloaded-virtual -fno-strict-aliasing -Wold-style-cast -Wno-unknown-pragmas -Wl,-z,relro -Wl,-z,now -Wl,--dependency-file=CMakeFiles/lgf_demo.dir/link.d CMakeFiles/lgf_demo.dir/lgf_demo.cc.o -o lgf_demo -L/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/lemon -Wl,-rpath,/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu/lemon ../lemon/liblemon.so.1.3.1 /usr/lib/aarch64-linux-gnu/libglpk.so make[4]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu' [ 92%] Built target lgf_demo make[3]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu' make[2]: *** [Makefile:169: all] Error 2 make[2]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg/obj-aarch64-linux-gnu' dh_auto_build: error: cd obj-aarch64-linux-gnu && make -j128 INSTALL="install --strip-program=true" VERBOSE=1 returned exit code 2 make[1]: *** [debian/rules:13: override_dh_auto_build] Error 25 make[1]: Leaving directory '/build/reproducible-path/liblemon-1.3.1+dfsg' make: *** [debian/rules:10: binary] Error 2 dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2 ]