Sorry, I already tried hard but failed to reproduce this problem so far.
Could it be related to a pch issue on your side ? Even if it is hard to
believe that both of you got this problem.
Maybe I need to do a full rebuild of gcc but it will take some more
time. Without feedback I'll do it at end of day.
François
On 3/18/26 19:07, Jonathan Wakely wrote:
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>'
