https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126984
--- Comment #2 from Alfie Richards <alfierichards at gcc dot gnu.org> ---
Seems to come from
/* Calculate the location of the statement in NODE to replace. */
stmt_info = SLP_TREE_SCALAR_STMTS (node)[0];
in complex_pattern::build (vec_info *vinfo)
