https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84974
Bug ID: 84974
Summary: internal compiler error: Segmentation fault
(ovl_first()/location_of())
Product: gcc
Version: 8.0.1
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vegard.nossum at oracle dot com
CC: webrown.cpp at gmail dot com
Target Milestone: ---
Input:
namespace {
template <typename> void a();
}
void a() {
struct {
__attribute__((noinline(a())));
int a;
}
}
Output:
$ cc1plus
void a()
<stdin>:7:9: error: declaration of 'int a()::<unnamed struct>::a'
[-fpermissive]
<stdin>:7:9: internal compiler error: Segmentation fault
0x3152ce9 crash_signal
/home/vegard/git/gcc/gcc/toplev.c:325
0xc88b74 ovl_first(tree_node*)
/home/vegard/git/gcc/gcc/cp/cp-tree.h:7442
0xc88b74 location_of(tree_node*)
/home/vegard/git/gcc/gcc/cp/error.c:3027
0x9cf0a3 note_name_declared_in_class(tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/cp/class.c:8253
0xe11d52 push_class_level_binding_1
/home/vegard/git/gcc/gcc/cp/name-lookup.c:4730
0xe4df5b push_class_level_binding(tree_node*, tree_node*)
/home/vegard/git/gcc/gcc/cp/name-lookup.c:4755
0xe4df5b pushdecl_class_level(tree_node*)
/home/vegard/git/gcc/gcc/cp/name-lookup.c:4480
0x1279877 finish_member_declaration(tree_node*)
/home/vegard/git/gcc/gcc/cp/semantics.c:3076
0xfdea1c cp_parser_member_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:23964
0xf142ab cp_parser_member_specification_opt
/home/vegard/git/gcc/gcc/cp/parser.c:23374
0xf142ab cp_parser_class_specifier_1
/home/vegard/git/gcc/gcc/cp/parser.c:22516
0xf231cb cp_parser_class_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:22768
0xf231cb cp_parser_type_specifier
/home/vegard/git/gcc/gcc/cp/parser.c:16774
0xf8858a cp_parser_decl_specifier_seq
/home/vegard/git/gcc/gcc/cp/parser.c:13629
0xfa3a70 cp_parser_simple_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12938
0xfab998 cp_parser_block_declaration
/home/vegard/git/gcc/gcc/cp/parser.c:12883
0xfade64 cp_parser_declaration_statement
/home/vegard/git/gcc/gcc/cp/parser.c:12476
0xefab2b cp_parser_statement
/home/vegard/git/gcc/gcc/cp/parser.c:10925
0xefe5eb cp_parser_statement_seq_opt
/home/vegard/git/gcc/gcc/cp/parser.c:11274
0xeff08a cp_parser_compound_statement
/home/vegard/git/gcc/gcc/cp/parser.c:11228
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.
Version:
GNU C++14 (GCC) version 8.0.1 20180306 (experimental) (x86_64-pc-linux-gnu)
Valgrind says:
==7029== Invalid read of size 2
==7029== at 0xC88B74: ovl_first (cp-tree.h:7442)
==7029== by 0xC88B74: location_of(tree_node*) (error.c:3027)
==7029== by 0x9CF0A3: note_name_declared_in_class(tree_node*, tree_node*)
(class.c:8253)
==7029== by 0xE11D52: push_class_level_binding_1(tree_node*, tree_node*)
(name-lookup.c:4730)
==7029== by 0xE4DF5B: push_class_level_binding (name-lookup.c:4755)
==7029== by 0xE4DF5B: pushdecl_class_level(tree_node*) [clone .part.99]
(name-lookup.c:4480)
==7029== by 0x1279877: finish_member_declaration(tree_node*)
(semantics.c:3076)
==7029== by 0xFDEA1C: cp_parser_member_declaration(cp_parser*)
(parser.c:23964)
==7029== by 0xF142AB: cp_parser_member_specification_opt (parser.c:23374)
==7029== by 0xF142AB: cp_parser_class_specifier_1(cp_parser*)
(parser.c:22516)
==7029== by 0xF231CB: cp_parser_class_specifier (parser.c:22768)
==7029== by 0xF231CB: cp_parser_type_specifier(cp_parser*, int,
cp_decl_specifier_seq*, bool, int*, bool*) (parser.c:16774)
==7029== by 0xF8858A: cp_parser_decl_specifier_seq(cp_parser*, int,
cp_decl_specifier_seq*, int*) (parser.c:13629)
==7029== by 0xFA3A70: cp_parser_simple_declaration(cp_parser*, bool,
tree_node**) (parser.c:12938)
==7029== by 0xFAB998: cp_parser_block_declaration(cp_parser*, bool)
(parser.c:12883)
==7029== by 0xFADE64: cp_parser_declaration_statement(cp_parser*)
(parser.c:12476)
==7029== Address 0x0 is not stack'd, malloc'd or (recently) free'd
That's:
7439 inline tree
7440 ovl_first (tree node)
7441 {
7442 while (TREE_CODE (node) == OVERLOAD)
7443 node = OVL_FUNCTION (node);
7444 return node;
7445 }
