https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84746
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- The SSA_NAME has been freed in: #1 0x0000000001291cfd in release_ssa_name_fn (fn=0x7fffefd9b000, var=<error_mark 0x7fffefda75a0>) at ../../gcc/tree-ssanames.c:579 #2 0x00000000010b76eb in release_ssa_name (name=<error_mark 0x7fffefda75a0>) at ../../gcc/tree-ssanames.h:141 #3 0x00000000010b8590 in remove_phi_node (gsi=0x7fffffffdb50, release_lhs_p=true) at ../../gcc/tree-phinodes.c:449 #4 0x0000000001221501 in vn_eliminate (inserted_exprs=0x2b51008) at ../../gcc/tree-ssa-sccvn.c:5928 #5 0x00000000011e94a2 in (anonymous namespace)::pass_pre::execute (this=0x2ae9720, fun=0x7fffefd9b000) at ../../gcc/tree-ssa-pre.c:4173 #6 0x0000000000e735c5 in execute_one_pass (pass=<opt_pass* 0x2ae9720 "pre"(139)>) at ../../gcc/passes.c:2497
