https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107768
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
#1 0x000000000106a451 in maybe_warn_zero_as_null_pointer_constant
(expr=<non_lvalue_expr 0x7ffff6e36420>, loc=16802880) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/tree.cc:6247
#2 0x0000000000c5b243 in conversion_null_warnings (totype=<pointer_type
0x7ffff6de8f18>, expr=<non_lvalue_expr 0x7ffff6e36420>, fn=<function_decl
0x7ffff6dd9300 __ct_comp >, argnum=0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8013
#3 0x0000000000c5c0df in convert_like_internal (convs=0x4c264b0,
expr=<non_lvalue_expr 0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9300
__ct_comp >, argnum=0, issue_conversion_warnings=true, c_cast_p=false,
nested_p=false, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8234
#4 0x0000000000c5e811 in convert_like (convs=0x4c264b0, expr=<non_lvalue_expr
0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9300 __ct_comp >, argnum=0,
issue_conversion_warnings=true, c_cast_p=false, nested_p=false, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8762
#5 0x0000000000c5e8cc in convert_like_with_context (convs=0x4c264b0,
expr=<non_lvalue_expr 0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9300
__ct_comp >, argnum=0, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8788
#6 0x0000000000c6375f in build_over_call (cand=0x4c264e0, flags=17,
complain=3) at /home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:9936
#7 0x0000000000c5c7b5 in convert_like_internal (convs=0x4c26610,
expr=<non_lvalue_expr 0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9b00
operator==>, argnum=1, issue_conversion_warnings=true, c_cast_p=false,
nested_p=false, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8302
#8 0x0000000000c5e811 in convert_like (convs=0x4c26610, expr=<non_lvalue_expr
0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9b00 operator==>, argnum=1,
issue_conversion_warnings=true, c_cast_p=false, nested_p=false, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8762
#9 0x0000000000c5e8cc in convert_like_with_context (convs=0x4c26610,
expr=<non_lvalue_expr 0x7ffff6e36420>, fn=<function_decl 0x7ffff6dd9b00
operator==>, argnum=1, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:8788
#10 0x0000000000c6375f in build_over_call (cand=0x4c26640, flags=1, complain=3)
at /home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:9936
#11 0x0000000000c5737f in build_new_op (loc=..., code=EQ_EXPR, flags=1,
arg1=<view_convert_expr 0x7ffff6e36400>, arg2=<non_lvalue_expr 0x7ffff6e36420>,
arg3=<tree 0x0>, lookups=<tree 0x0>, overload=0x7fffffffcf18, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/call.cc:6986
#12 0x000000000108fc84 in build_x_binary_op (loc=..., code=EQ_EXPR,
arg1=<view_convert_expr 0x7ffff6e36400>, arg1_code=ERROR_MARK,
arg2=<non_lvalue_expr 0x7ffff6e36420>, arg2_code=ERROR_MARK, lookups=<tree
0x0>, overload_p=0x7fffffffcfb8, complain=3) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/typeck.cc:4722
#13 0x0000000000ee2dde in cp_parser_binary_expression (parser=0x7ffff7274be0,
cast_p=false, no_toplevel_fold_p=false, decltype_p=false,
prec=PREC_NOT_OPERATOR, pidk=0x0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:10280
#14 0x0000000000ee337a in cp_parser_assignment_expression
(parser=0x7ffff7274be0, pidk=0x0, cast_p=false, decltype_p=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:10441
#15 0x0000000000ee3704 in cp_parser_expression (parser=0x7ffff7274be0,
pidk=0x0, cast_p=false, decltype_p=false, warn_comma_p=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:10611
#16 0x0000000000eedaea in cp_parser_jump_statement (parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:14356
#17 0x0000000000ee8970 in cp_parser_statement (parser=0x7ffff7274be0,
in_statement_expr=<tree 0x0>, in_compound=true, if_p=0x0, chain=0x0,
loc_after_labels=0x0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:12332
#18 0x0000000000ee9c92 in cp_parser_statement_seq_opt (parser=0x7ffff7274be0,
in_statement_expr=<tree 0x0>) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:12906
#19 0x0000000000ee9b74 in cp_parser_compound_statement (parser=0x7ffff7274be0,
in_statement_expr=<tree 0x0>, bcs_flags=0, function_body=true) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:12858
#20 0x0000000000f0464c in cp_parser_function_body (parser=0x7ffff7274be0,
in_function_try_block=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:25241
#21 0x0000000000f04970 in cp_parser_ctor_initializer_opt_and_function_body
(parser=0x7ffff7274be0, in_function_try_block=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:25292
#22 0x0000000000f12fff in cp_parser_function_definition_after_declarator
(parser=0x7ffff7274be0, inline_p=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:31902
#23 0x0000000000f12e10 in
cp_parser_function_definition_from_specifiers_and_declarator
(parser=0x7ffff7274be0, decl_specifiers=0x7fffffffd7f0, attributes=<tree_list
0x7ffff6e2feb0>, declarator=0x4c16450) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:31819
#24 0x0000000000efebc5 in cp_parser_init_declarator (parser=0x7ffff7274be0,
flags=0, decl_specifiers=0x7fffffffd7f0, checks=0x0,
function_definition_allowed_p=true, member_p=false, declares_class_or_enum=0,
function_definition_p=0x7fffffffd779, maybe_range_for_decl=0x0,
init_loc=0x7fffffffd780,
auto_result=0x7fffffffd788) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:22693
#25 0x0000000000eefdd6 in cp_parser_simple_declaration (parser=0x7ffff7274be0,
function_definition_allowed_p=true, maybe_range_for_decl=0x0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15341
#26 0x0000000000eef8cf in cp_parser_block_declaration (parser=0x7ffff7274be0,
statement_p=false) at /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15161
#27 0x0000000000eef51d in cp_parser_declaration (parser=0x7ffff7274be0,
prefix_attrs=<tree 0x0>) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15027
#28 0x0000000000eef5e9 in cp_parser_toplevel_declaration
(parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15048
#29 0x0000000000eeeaef in cp_parser_declaration_seq_opt (parser=0x7ffff7274be0)
at /home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:14799
#30 0x0000000000efbf28 in cp_parser_namespace_body (parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:21498
#31 0x0000000000efbebd in cp_parser_namespace_definition
(parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:21476
#32 0x0000000000eef3f6 in cp_parser_declaration (parser=0x7ffff7274be0,
prefix_attrs=<tree 0x0>) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15007
#33 0x0000000000eef5e9 in cp_parser_toplevel_declaration
(parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:15048
#34 0x0000000000ed74fc in cp_parser_translation_unit (parser=0x7ffff7274be0) at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:5090
#35 0x0000000000f4e06b in c_parse_file () at
/home/apinski/src/upstream-gcc/gcc/gcc/cp/parser.cc:49349
#36 0x000000000115200a in c_common_parse_file () at
/home/apinski/src/upstream-gcc/gcc/gcc/c-family/c-opts.cc:1248
#37 0x000000000197da00 in compile_file () at
/home/apinski/src/upstream-gcc/gcc/gcc/toplev.cc:444
#38 0x0000000001980acd in do_compile (no_backend=false) at
/home/apinski/src/upstream-gcc/gcc/gcc/toplev.cc:2125
#39 0x0000000001980eb5 in toplev::main (this=0x7fffffffdd62, argc=5,
argv=0x7fffffffde68) at /home/apinski/src/upstream-gcc/gcc/gcc/toplev.cc:2277
#40 0x0000000003293c49 in main (argc=5, argv=0x7fffffffde68) at
/home/apinski/src/upstream-gcc/gcc/gcc/main.cc:39
