https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97511
Bug ID: 97511
Summary: [11 Regression] ICE in template_parm_to_arg, at
cp/pt.c:4744
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
g++-11.0.0-alpha20201018 snapshot (g:1e70b1a358b6ce3b894f284d88fbb90518d45cc0)
ICEs when compiling the following testcase, reduced from
test/SemaCXX/alias-template.cpp from the clang 10.0.1 test suite:
template <typename Z> using Z = Z;
% g++-11.0.0 -c bul6e40q.cpp
bul6e40q.cpp:1:34: internal compiler error: in template_parm_to_arg, at
cp/pt.c:4744
1 | template <typename Z> using Z = Z;
| ^
0x67334e template_parm_to_arg(tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/pt.c:4744
0xa0b849 template_parms_level_to_args(tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/pt.c:4794
0xa0b927 template_parms_to_args(tree_node*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/pt.c:4822
0xa4f31f current_template_args
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/pt.c:4839
0xa4f31f push_template_decl(tree_node*, bool)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/pt.c:5874
0x9436b1 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/decl.c:5398
0x9e200f cp_parser_alias_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:20240
0x9fb82f cp_parser_template_declaration_after_parameters
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:29233
0x9fbd00 cp_parser_explicit_template_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:29507
0x9ffa29 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:13524
0xa00010 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:4793
0xa00010 c_parse_file()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/cp/parser.c:44170
0xb2172d c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20201018/work/gcc-11-20201018/gcc/c-family/c-opts.c:1188
