On Wed, 18 Mar 2026 at 16:41, Tomasz Kaminski <[email protected]> wrote: > > > > On Mon, Mar 9, 2026 at 12:04 PM Tomasz Kaminski <[email protected]> wrote: >> >> I believe, this caused failure >> 21_strings/basic_string/requirements/dr438/constructor.c in C++20 mode:: >> In file included from >> /home/tkaminsk/build/gcc/16/x86_64-pc-linux-gnu/libstdc++-v3/include/debug/functions.h:39, >> from >> /home/tkaminsk/build/gcc/16/x86_64-pc-linux-gnu/libstdc++-v3/include/debug/safe_sequence.h:34, >> from >> /home/tkaminsk/build/gcc/16/x86_64-pc-linux-gnu/libstdc++-v3/include/debug/string:37, >> from >> /home/tkaminsk/src/gcc/libstdc++-v3/testsuite/21_strings/basic_string/requirements/dr438/constructor.cc:23: >> /home/tkaminsk/build/gcc/16/x86_64-pc-linux-gnu/libstdc++-v3/include/debug/helper_functions.h: >> In instantiation of 'constexpr bool >> __gnu_debug::__valid_range(_InputIterator, _InputIterator) [with >> _InputIterator = int]': > > The full test suite showed 705 failures for _GLIBCXX_DEBUG=1 run, and every > one I checked has the same error. They may be other, but are very hard to > find. > They are mostly point toward basic_regexp or basic_string. > See the attachment for the full list. > > (The workaround seems far for useless currently).
Yes, I can confirm these failures are still present. This is enough to reproduce them: make check RUNTESTFLAGS=--target_board=unix/-D_GLIBCXX_DEBUG There are two failures in 21_strings: FAIL: 21_strings/basic_string/requirements/explicit_instantiation/int.cc -std=gnu++11 (test for excess errors) FAIL: 21_strings/basic_string/requirements/explicit_instantiation/debug.cc -std=gnu++11 (test for excess errors) and all the others seem to have the same root cause, related to regex: FAIL: std/ranges/adaptors/p2770r0.cc -std=gnu++20 (test for excess errors) Excess errors: /home/test/build/x86_64-pc-linux-gnu/libstdc++-v3/include/debug/helper_functions.h:212: error: no matching function for call to '__iterator_category(int&)' /home/test/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/regex_compiler.tcc:313: [ skipping 2 instantiation contexts, use -ftemplate-backtrace-limit =0 to disable ] /home/test/build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_iterator_base_types.h:241: error: no type named 'iterator_category' in 'struct std::itera tor_traits<int>'
