https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111920
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- N.B. this same ICE was affecting C++ too, several libstdc++ tests failed with -std=c++20, e.g. GLIBCXX_TESTSUITE_STDS=20 make check RUNTESTFLAGS=conformance.exp=*/48101-2_neg.cc
