https://gcc.gnu.org/g:312de24741a88bd519b7371f88e8c7919e9c4dcb
commit r15-11435-g312de24741a88bd519b7371f88e8c7919e9c4dcb Author: Jakub Jelinek <[email protected]> Date: Tue Jul 28 10:52:28 2026 +0200 libstdc++: Remove unused variable https://builder.sourceware.org/buildbot/#/builders/312/builds/3547 shows In file included from /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/deque:72, from /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/stack:68, from ../../gcc/gcc/cobol/cobol-system.h:52, from ../../gcc/gcc/cobol/lexio.cc:33: /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/deque.tcc: In instantiation of ‘std::_Deque_iterator<_OTp, _OTp&, _OTp*> std::__uninitialized_copy_a(_Deque_iterator<_Tp, _Ref, _Ptr>, _Deque_iterator<_Tp, _Ref, _Ptr>, _Deque_iterator<_OTp, _OTp&, _OTp*>, allocator<_Tp>&) [with _ITp = source_format_t; _IRef = const source_format_t&; _IPtr = const source_format_t*; _OTp = source_format_t; _Tp = source_format_t]’: /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_deque.h:922:36: required from ‘std::deque<_Tp, _Alloc>::deque(const std::deque<_Tp, _Alloc>&) [with _Tp = source_format_t; _Alloc = std::allocator<source_format_t>]’ 922 | { std::__uninitialized_copy_a(__x.begin(), __x.end(), | ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ 923 | this->_M_impl._M_start, | ~~~~~~~~~~~~~~~~~~~~~~~ 924 | _M_get_Tp_allocator()); } | ~~~~~~~~~~~~~~~~~~~~~~ /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_stack.h:107:11: required from here 107 | class stack | ^~~~~ /home/builder/shared/sw3bb1/worker/gcc-fullest-debian-amd64/gcc-build/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/bits/deque.tcc:1577:19: error: unused variable ‘__sres’ [-Werror=unused-variable] 1577 | _OTp* __sres = __result._M_cur; | ^~~~~~ cc1plus: all warnings being treated as errors make[3]: *** [Makefile:1218: cobol/lexio.o] Error 1 There is indeed an unused variable introduced in r16-8142. The following patch removes it. 2026-07-28 Jakub Jelinek <[email protected]> * include/bits/deque.tcc (std::__uninitialized_copy_a): Remove unused variable __sres. (cherry picked from commit 51c8f33686071ce874915a6cfeb85f337071d45d) Diff: --- libstdc++-v3/include/bits/deque.tcc | 1 - 1 file changed, 1 deletion(-) diff --git a/libstdc++-v3/include/bits/deque.tcc b/libstdc++-v3/include/bits/deque.tcc index f7ee807fa340..21e363134840 100644 --- a/libstdc++-v3/include/bits/deque.tcc +++ b/libstdc++-v3/include/bits/deque.tcc @@ -1567,7 +1567,6 @@ _GLIBCXX_END_NAMESPACE_CONTAINER __n = __last._M_cur - __from; else __n = __first._M_last - __from; - _OTp* __sres = __result._M_cur; __n = std::min<ptrdiff_t>(__n, __result._M_last - __result._M_cur); std::uninitialized_copy(__from, __from + __n, __result._M_cur); __first += __n;
