https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98597
Bug ID: 98597 Summary: [11 Regression] ICE in print_mem_ref since r11-6508-gabb1b6058c09a7c0 Product: gcc Version: 11.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: marxin at gcc dot gnu.org CC: msebor at gcc dot gnu.org Target Milestone: --- One more ICE I found: $ cat x.C struct shared_count { shared_count() {} shared_count(shared_count &r) : pi(r.pi) {} int pi; }; struct shared_ptr { int ptr; shared_count refcount; }; struct Bar { Bar(int, shared_ptr); }; void g() { shared_ptr foo; Bar(0, foo); } $ g++ x.C -O2 -Wuninitialized -c In copy constructor ‘shared_ptr::shared_ptr(shared_ptr&)’, inlined from ‘void g()’ at x.C:15:13: x.C:6:8: warning: ‘foo.shared_ptr::ptr’ is used uninitialized [-Wuninitialized] 6 | struct shared_ptr { | ^~~~~~~~~~ x.C: In function ‘void g()’: x.C:14:14: note: ‘foo’ declared here 14 | shared_ptr foo; | ^~~ ‘ during GIMPLE pass: uninit Segmentation fault 13 | void g() { | ^ 0x10bf64f crash_signal /home/marxin/Programming/gcc/gcc/toplev.c:327 0xbc57bc print_mem_ref /home/marxin/Programming/gcc/gcc/c-family/c-pretty-print.c:1851 0x9c4b2f dump_expr /home/marxin/Programming/gcc/gcc/cp/error.c:2366 0x9c97d0 expr_to_string(tree_node*) /home/marxin/Programming/gcc/gcc/cp/error.c:3187 0x9c9f0c cp_printer /home/marxin/Programming/gcc/gcc/cp/error.c:4355 0x1c30a8c pp_format(pretty_printer*, text_info*) /home/marxin/Programming/gcc/gcc/pretty-print.c:1475 0x1c148e6 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*) /home/marxin/Programming/gcc/gcc/diagnostic.c:1216 0x1c16e48 diagnostic_impl /home/marxin/Programming/gcc/gcc/diagnostic.c:1366 0x1c16e48 warning_at(unsigned int, int, char const*, ...) /home/marxin/Programming/gcc/gcc/diagnostic.c:1503 0x12d0e16 maybe_warn_operand /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.c:418 0x12d423f warn_uninitialized_vars /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.c:657 0x12d83f2 execute /home/marxin/Programming/gcc/gcc/tree-ssa-uninit.c:3019 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions.