https://gcc.gnu.org/g:e8cf136b1a281db54edf5f824e8b08e5b757269f
commit r16-5494-ge8cf136b1a281db54edf5f824e8b08e5b757269f Author: Jonathan Wakely <[email protected]> Date: Fri Nov 21 12:02:54 2025 +0000 libstdc++: Include <ostream> in <regex> for debug mode I don't know what changed, but I'm seeing some new failures: FAIL: 23_containers/vector/capacity/114945.cc -std=gnu++11 (test for excess errors) FAIL: 23_containers/vector/capacity/114945.cc -std=gnu++14 (test for excess errors) FAIL: 23_containers/vector/capacity/114945.cc -std=gnu++17 (test for excess errors) FAIL: 28_regex/basic_regex/85098.cc -std=gnu++11 (test for excess errors) FAIL: 28_regex/basic_regex/85098.cc -std=gnu++14 (test for excess errors) FAIL: 28_regex/basic_regex/85098.cc -std=gnu++17 (test for excess errors) FAIL: 28_regex/simple_c++11.cc (test for excess errors) libstdc++-v3/ChangeLog: * include/bits/regex_automaton.tcc [_GLIBCXX_DEBUG]: Include <ostream> so that _State_base::_M_print etc. can use it. Diff: --- libstdc++-v3/include/bits/regex_automaton.tcc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libstdc++-v3/include/bits/regex_automaton.tcc b/libstdc++-v3/include/bits/regex_automaton.tcc index 8a826469db10..4d566c62ecdd 100644 --- a/libstdc++-v3/include/bits/regex_automaton.tcc +++ b/libstdc++-v3/include/bits/regex_automaton.tcc @@ -28,6 +28,10 @@ * Do not attempt to use it directly. @headername{regex} */ +#ifdef _GLIBCXX_DEBUG +# include <ostream> +#endif + namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION
