https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105256
--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> --- This reduced code crashes with GCC 8 up to trunk: struct S { struct Prefs { struct { int i = i; } p; void Load(); }; }; void S::Prefs::Load() { *this = {}; }; $ xg++ -c ff.C ff.C: In member function ‘void S::Prefs::Load()’: ff.C:11:12: internal compiler error: in gimplify_expr, at gimplify.cc:15905 11 | *this = {}; | ^ 0x1370253 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) /home/mpolacek/src/gcc/gcc/gimplify.cc:15905 0x13360f8 gimplify_compound_lval /home/mpolacek/src/gcc/gcc/gimplify.cc:3272 0x136cfa4 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) /home/mpolacek/src/gcc/gcc/gimplify.cc:15050 0x133bc99 gimplify_init_ctor_preeval /home/mpolacek/src/gcc/gcc/gimplify.cc:4781 0x133bc48 gimplify_init_ctor_preeval /home/mpolacek/src/gcc/gcc/gimplify.cc:4767 0x133bc48 gimplify_init_ctor_preeval /home/mpolacek/src/gcc/gcc/gimplify.cc:4767 0x133d603 gimplify_init_constructor /home/mpolacek/src/gcc/gcc/gimplify.cc:5357 0x133e452 gimplify_modify_expr_rhs /home/mpolacek/src/gcc/gcc/gimplify.cc:5674 0x133f66f gimplify_modify_expr /home/mpolacek/src/gcc/gcc/gimplify.cc:6040 0x136d142 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) /home/mpolacek/src/gcc/gcc/gimplify.cc:15098 0x1343c11 gimplify_stmt(tree_node**, gimple**) /home/mpolacek/src/gcc/gcc/gimplify.cc:7151 0x1343164 gimplify_cleanup_point_expr /home/mpolacek/src/gcc/gcc/gimplify.cc:6892 0x136ebdb gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int) /home/mpolacek/src/gcc/gcc/gimplify.cc:15491 0x1343c11 gimplify_stmt(tree_node**, gimple**) /home/mpolacek/src/gcc/gcc/gimplify.cc:7151 0x1371bfb gimplify_body(tree_node*, bool) /home/mpolacek/src/gcc/gcc/gimplify.cc:16355 0x13722f8 gimplify_function_tree(tree_node*) /home/mpolacek/src/gcc/gcc/gimplify.cc:16509 0x10c08c9 cgraph_node::analyze() /home/mpolacek/src/gcc/gcc/cgraphunit.cc:676 0x10c2955 analyze_functions /home/mpolacek/src/gcc/gcc/cgraphunit.cc:1241 0x10c5b05 symbol_table::finalize_compilation_unit() /home/mpolacek/src/gcc/gcc/cgraphunit.cc:2501