https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99072
--- Comment #3 from Nathan Sidwell <nathan at gcc dot gnu.org> --- Cannot reproduce: devvm1702:150>./xg++ -B./ -nostdinc++ -I../x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I../x86_64-pc-linux-gnu/libstdc++-v3/include -I../../..//src/libstdc++-v3/libsupc++ -I../../../src/libstdc++-v3/include/backward -I../../../src/libstdc++-v3/testsuite/util -std=c++2a -fmodule-header -E -fdirectives-only -o 99072_a.so.ii 99072_a.H devvm1702:151>./xg++ -B./ -nostdinc++ -I../x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I../x86_64-pc-linux-gnu/libstdc++-v3/include -I../../..//src/libstdc++-v3/libsupc++ -I../../../src/libstdc++-v3/include/backward -I../../../src/libstdc++-v3/testsuite/util -std=c++2a -fmodule-header -fpreprocessed -fdirectives-only -c 99072_a.so.ii devvm1702:152>./xg++ -B./ -nostdinc++ -I../x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I../x86_64-pc-linux-gnu/libstdc++-v3/include -I../../..//src/libstdc++-v3/libsupc++ -I../../../src/libstdc++-v3/include/backward -I../../../src/libstdc++-v3/testsuite/util -std=c++2a -fmodules-ts -c 99072_b.C devvm1702:153>./xg++ -B./ -nostdinc++ -I../x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I../x86_64-pc-linux-gnu/libstdc++-v3/include -I../../..//src/libstdc++-v3/libsupc++ -I../../../src/libstdc++-v3/include/backward -I../../../src/libstdc++-v3/testsuite/util -std=c++2a -fmodule-header -fpreprocessed -fdirectives-only -c 99072_a.so.ii devvm1702:154>./xg++ -B./ -nostdinc++ -I../x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I../x86_64-pc-linux-gnu/libstdc++-v3/include -I../../..//src/libstdc++-v3/libsupc++ -I../../../src/libstdc++-v3/include/backward -I../../../src/libstdc++-v3/testsuite/util -std=c++2a -fmodules-ts -c 99072_c.C
