https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93639
Bug ID: 93639
Summary: [c++2a] Segfault on non type template parameter and
consteval (master)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: raphael.grimm at kit dot edu
Target Milestone: ---
Created attachment 47802
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47802&action=edit
source
I played around with some new features and encountered a segfault:
the exact version of GCC:
commit b780f68e025b2cf5631183e199ebf672ea463af6
the system type:
$ uname -a
Linux i61nb061 4.15.0-76-generic #86-Ubuntu SMP Fri Jan 17 17:24:28 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
the options given when GCC was configured/built;
./configure" \
-v \
--build=x86_64-linux-gnu \
--host=x86_64-linux-gnu \
--target=x86_64-linux-gnu \
--prefix="$install_dir" \
--enable-checking=release \
--enable-languages=c,c++,fortran \
--disable-multilib \
--program-suffix="-b780f68e025b2cf5631183e199ebf672ea463af6"
the complete command line that triggers the bug;
$ gcc-master test.cpp -std=c++2a -save-temps
the compiler output (error messages, warnings, etc.);
test.cpp:25:26: internal compiler error: Segmentation fault
25 | using type = a<name()>;
| ^
0xc8980f crash_signal
/home/username/repos/build-gcc/gcc/gcc/toplev.c:328
0x673d73 resolve_args(vec<tree_node*, va_gc, vl_embed>*, int)
/home/username/repos/build-gcc/gcc/gcc/cp/call.c:4431
0x78513c do_class_deduction
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:28599
0x78513c do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:28732
0x7865cd convert_template_argument
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:8309
0x798db7 convert_template_argument
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:8082
0x798db7 coerce_template_parms
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:8813
0x79cbd9 lookup_template_class_1
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:9668
0x79dedc lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
/home/username/repos/build-gcc/gcc/gcc/cp/pt.c:10040
0x7b925d finish_template_type(tree_node*, tree_node*, int)
/home/username/repos/build-gcc/gcc/gcc/cp/semantics.c:3407
0x762265 cp_parser_template_id
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:16681
0x7624b7 cp_parser_class_name
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:23618
0x75f2e1 cp_parser_qualifying_entity
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:6738
0x75f2e1 cp_parser_nested_name_specifier_opt
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:6410
0x766661 cp_parser_simple_type_specifier
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:18076
0x74d46c cp_parser_type_specifier
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:17734
0x760af2 cp_parser_type_specifier_seq
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:22307
0x75adb4 cp_parser_type_id_1
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:22124
0x75bf58 cp_parser_type_id
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:22203
0x75bf58 cp_parser_alias_declaration
/home/username/repos/build-gcc/gcc/gcc/cp/parser.c:19949
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.
