https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107156
Bug ID: 107156 Summary: ice in lookup_attribute_by_prefix, at attribs.h:239 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: dcb314 at hotmail dot com Target Milestone: --- For testsuite file ./gcc.dg/c2x-attr-noreturn-1.c, with recent gcc, I get this: [/home/dcb/gcc/trunk.git/gcc/testsuite] $ /home/dcb/gcc/results/bin/gcc -c -w -O2 ./gcc.dg/c2x-attr-noreturn-1.c during IPA pass: icf ./gcc.dg/c2x-attr-noreturn-1.c:56:1: internal compiler error: in lookup_attribute_by_prefix, at attribs.h:239 56 | [[noreturn]] int main (); | ^ 0x1bd9afe lookup_attribute_by_prefix(char const*, tree_node*) ../../trunk.git/gcc/attribs.h:239 Please not I am not using any -std= flag. The bug first seems to occur sometime between git hash f758d447d7f46992 and 43faf3e5445b5717, which is about 50 commits.