https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80797
--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> --- I applied your patch to version 8 trunk 247930 and it seems to work, but on your example I get ubsan-1.c:10:8: runtime error: member access within null pointer of type 'struct S' ubsan-1.c:11:8: runtime error: member access within null pointer of type 'struct S' pointing at column 8 to v and v2. Shouldn't they point to s or i?
