[Bug debug/104564] '-fcompare-debug' failure w/ -std=c++20 -O1 -fharden-conditional-branches -fopenacc -gno-statement-frontiers

[asolokha at gmx dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104564

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
#include <testsuite_iterators.h>

is from -Ilibstdc++-v3/testsuite/util, if invoking g++ from the top of the
source tree.