[Bug lto/65559] [5/6 Regression] lto1.exe: internal compiler error: in read_cgraph_and_symbols, at lto/lto.c:2947

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65559

--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that the issue should only cause option merging to be skipped for files in
archives (and that, too, on x86_64-linux).  Though compared to the 4.9 branch
we do

      fd = open (argv[i], O_RDONLY);
      if (fd == -1)
        {
          lto_argv[lto_argc++] = argv[i];
          continue;
        }

vs.

     fd = open (argv[i], O_RDONLY);
      if (fd == -1)
        continue;

so we add the file to later processing even if we failed to open it.  Thus,
does removing _that_ also fix the issue?