https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104409
--- Comment #4 from Zdenek Sojka <zsojka at seznam dot cz> --- Probably related crash: (with -fpack-struct) $ echo > testcase.c aarch64-unknown-linux-gnu-gcc -march=armv8.6-a+ls64 -fpack-struct testcase.c <built-in>: internal compiler error: in aarch64_init_ls64_builtins_types, at config/aarch64/aarch64-builtins.cc:1616 0x8645dc aarch64_init_ls64_builtins_types /repo/gcc-trunk/gcc/config/aarch64/aarch64-builtins.cc:1616 0x8645dc aarch64_init_ls64_builtins /repo/gcc-trunk/gcc/config/aarch64/aarch64-builtins.cc:1622 0x8645dc aarch64_general_init_builtins() /repo/gcc-trunk/gcc/config/aarch64/aarch64-builtins.cc:1735 0x14b06b8 aarch64_init_builtins /repo/gcc-trunk/gcc/config/aarch64/aarch64.cc:14335 0xb6d2bd c_define_builtins /repo/gcc-trunk/gcc/c-family/c-common.cc:4221 0xb6d2bd c_common_nodes_and_builtins() /repo/gcc-trunk/gcc/c-family/c-common.cc:4708 0xac0678 c_init_decl_processing() /repo/gcc-trunk/gcc/c/c-decl.cc:4503 0xb07368 c_objc_common_init() /repo/gcc-trunk/gcc/c/c-objc-common.cc:62 0xaac283 lang_dependent_init /repo/gcc-trunk/gcc/toplev.cc:1848 0xaac283 do_compile /repo/gcc-trunk/gcc/toplev.cc:2143 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.