https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118927
--- Comment #4 from Nate Eldredge <nate at thatsmathematics dot com> --- Note for testing that the compiler doesn't crash when compiling only bits/std.cc, or when a-std.ii and a-foo.ii are concatenated into a single file. It seems to be important that they are passed as separate files on the command line. I should also point out that the compiler is configured with --enable-checking.