https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106745
David Faust <david.faust at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |david.faust at oracle dot com --- Comment #1 from David Faust <david.faust at oracle dot com> --- Thanks, I've reproduced the failure and found the issue. The code which generates the CO-RE relocations isn't correctly handling anonymous inner struct/union decls. So for example: struct core_reloc_flavors___weird { struct { int b; }; union { int a; int c; }; }; Asking to generate a CO-RE relo for access to a, b or c here will trigger the SEGV. Working on a fix.