[From nobody Tue Apr 21 23:35:06 2026 Received: (at maintonly) by bugs.debian.org; 13 Apr 2026 13:05:52 +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, 42; hammy, 150; neutral, 209; 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]:56742) 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 1wCGzA-002lTW-02 for maintonly@bugs.debian.org; Mon, 13 Apr 2026 13:05:52 +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=yOHofk+cx90Ib8Ou0N6rVo2zTMtkLxssD8cwJCwwsBI=; b=wA6tmfGANTDhALOrgodcSESQst XzXyHD/nbOj9fxdU9biHDrYdANT2sRKxs66M72B5ebdlL65/4QRtx9FpLGGbHov8OU77oBQ/2slz9 hGPuFdoyEr5FnX1R+umlIria+/MMscH5Dfn1nlh2ioVjBi9GavDZ9ZTpup7/tIjdhyL2+bJjPHUQG 9an3nD5kQPhmayk4v/Ggi+fYmZhpWm08DJ9RNUdV7a8KFKVzFZ12ya5f+XdD9F7FlVJbdhOxkotTs XEnby3JqU9IDdr6i2JPPCyKYnlHX27A7Ck4CkO419F/G5kdPnaGDwApyLkNamUEb8/kk2sRDlIJ+d I2uZQMsA==; 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 1wCGz8-00CJQA-1X for maintonly@bugs.debian.org; Mon, 13 Apr 2026 13:05:50 +0000 Date: Mon, 13 Apr 2026 15:05:50 +0200 From: Emanuele Rocca <ema@debian.org> To: maintonly@bugs.debian.org Subject: libmmap-allocator: ftbfs with GCC-16 Message-ID: <adzqLgikS4bD1pSX@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:libmmap-allocator Version: 0.4.0+git20200122.adbfbe1-2.1 Severity: important Tags: sid forky ftbfs User: debian-gcc@lists.debian.org Usertags: ftbfs-gcc-16 Hi, libmmap-allocator 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/libmmap-allocator_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. [...] make[1]: Entering directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' dh_auto_build -- libmmap_allocator.so libmmap_allocator.a make -j128 INSTALL="install --strip-program=true" libmmap_allocator.so libmmap_allocator.a make[2]: Entering directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' g++ -g -O2 -ffile-prefix-map=/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -g -Wall -fPIC -c -o mmap_file_pool.o mmap_file_pool.cpp g++ -shared -o libmmap_allocator.so mmap_file_pool.o -Wl,-z,relro ar r libmmap_allocator.a mmap_file_pool.o ar: creating libmmap_allocator.a make[2]: Leaving directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' make[1]: Leaving directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' debian/rules override_dh_auto_test make[1]: Entering directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' make test make[2]: Entering directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' g++ -g -O2 -ffile-prefix-map=/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -g -Wall -fPIC -c -o test_allocator.o test_allocator.cpp test_allocator.cpp: In function ‘void test_test_file(int, bool)’: test_allocator.cpp:40:24: warning: unused variable ‘r’ [-Wunused-variable] 40 | size_t r = fread(&j, 1, sizeof(j), f); | ^ test_allocator.cpp: In function ‘void test_throw_catch()’: test_allocator.cpp:71:43: warning: catching polymorphic type ‘class mmap_allocator_namespace::mmap_allocator_exception’ by value [-Wcatch-value=] 71 | } catch (mmap_allocator_exception e) { | ^ test_allocator.cpp:78:43: warning: catching polymorphic type ‘class mmap_allocator_namespace::mmap_allocator_exception’ by value [-Wcatch-value=] 78 | } catch (mmap_allocator_exception e) { | ^ test_allocator.cpp: In function ‘void test_exceptions()’: test_allocator.cpp:95:43: warning: catching polymorphic type ‘class mmap_allocator_namespace::mmap_allocator_exception’ by value [-Wcatch-value=] 95 | } catch (mmap_allocator_exception e) { | ^ test_allocator.cpp:105:43: warning: catching polymorphic type ‘class mmap_allocator_namespace::mmap_allocator_exception’ by value [-Wcatch-value=] 105 | } catch (mmap_allocator_exception e) { | ^ test_allocator.cpp: In function ‘void test_new_interface()’: test_allocator.cpp:357:43: warning: catching polymorphic type ‘class mmap_allocator_namespace::mmap_allocator_exception’ by value [-Wcatch-value=] 357 | } catch (mmap_allocator_exception e) { | ^ In file included from test_allocator.cpp:1: mmap_allocator.h: In instantiation of ‘T* mmap_allocator_namespace::mmap_allocator<T>::allocate(size_type, const void*) [with T = int; pointer = int*; size_type = long unsigned int]’: /usr/include/c++/16/bits/alloc_traits.h:385:28: required from ‘static constexpr std::allocator_traits< <template-parameter-1-1> >::pointer std::allocator_traits< <template-parameter-1-1> >::allocate(_Alloc&, size_type) [with _Alloc = mmap_allocator_namespace::mmap_allocator<int>; pointer = int*; size_type = long unsigned int]’ 385 | { return __a.allocate(__n); } | ~~~~~~~~~~~~^~~~~ /usr/include/c++/16/bits/stl_vector.h:389:33: required from ‘constexpr std::_Vector_base<_Tp, _Alloc>::pointer std::_Vector_base<_Tp, _Alloc>::_M_allocate(std::size_t) [with _Tp = int; _Alloc = mmap_allocator_namespace::mmap_allocator<int>; pointer = int*; std::size_t = long unsigned int]’ 389 | return __n != 0 ? _Tr::allocate(_M_impl, __n) : pointer(); | ~~~~~~~~~~~~~^~~~~~~~~~~~~~ /usr/include/c++/16/bits/vector.tcc:82:33: required from ‘constexpr void std::vector<_Tp, _Alloc>::reserve(size_type) [with _Tp = int; _Alloc = mmap_allocator_namespace::mmap_allocator<int>; size_type = long unsigned int]’ 82 | __tmp = this->_M_allocate(__n); | ~~~~~~~~~~~~~~~~~^~~~~ mmappable_vector.h:71:17: required from ‘void mmap_allocator_namespace::mmappable_vector<T, A>::mmap_file(size_t) [with T = int; A = mmap_allocator_namespace::mmap_allocator<int>; size_t = long unsigned int]’ 71 | Base::reserve(n); | ~~~~~~~~~~~~~^~~ test_allocator.cpp:129:27: required from here 129 | int_vec_default.mmap_file(1024); | ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~ mmap_allocator.h:39:67: error: no matching function for call to ‘mmap_allocator_namespace::mmap_allocator<int>::allocate(mmap_allocator_namespace::mmap_allocator<int>::size_type&, const void*&)’ 39 | return std::allocator<T>::allocate(n, hint); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ • there is 1 candidate In file included from /usr/include/c++/16/memory:67, from mmap_allocator.h:4: • candidate 1: ‘constexpr _Tp* std::allocator< <template-parameter-1-1> >::allocate(std::size_t) [with _Tp = int; std::size_t = long unsigned int]’ /usr/include/c++/16/bits/allocator.h:194:7: 194 | allocate(size_t __n) | ^~~~~~~~ • candidate expects 1 argument, 2 provided make[2]: *** [<builtin>: test_allocator.o] Error 1 make[2]: Leaving directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' make[1]: *** [debian/rules:13: override_dh_auto_test] Error 2 make[1]: Leaving directory '/build/reproducible-path/libmmap-allocator-0.4.0+git20200122.adbfbe1' make: *** [debian/rules:6: binary] Error 2 dpkg-buildpackage: error: debian/rules binary subprocess failed with exit status 2 ]