https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106260
--- Comment #5 from Zdenek Sojka <zsojka at seznam dot cz> --- Created attachment 56843 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56843&action=edit slightly reduced testcase $ x86_64-pc-linux-gnu-gcc -O2 -fno-unit-at-a-time -fwhole-program testcase.C during IPA pass: cp testcase.C:27:1: internal compiler error: in initialize_node_lattices, at ipa-cp.cc:1593 27 | } | ^ 0xe60b6b initialize_node_lattices /repo/gcc-trunk/gcc/ipa-cp.cc:1593 0xe60b6b ipcp_propagate_stage /repo/gcc-trunk/gcc/ipa-cp.cc:4300 0xe60b6b ipcp_driver /repo/gcc-trunk/gcc/ipa-cp.cc:6700 0xe60b6b execute /repo/gcc-trunk/gcc/ipa-cp.cc:6775 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.