https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88982
Bug ID: 88982
Summary: ICE in tsubst_pack_expansion, at cp/pt.c:12221
Product: gcc
Version: 8.0
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++-9.0.0-alpha20190120 snapshot (r268107) ICE when compiling the following
testcase reduced from test/CXX/temp/temp.param/p15-cxx0x.cpp from the clang
7.0.1 testsuite:
template<typename...Ts> struct A {
template<template<typename, Ts = 0> class ...Cs, Cs<Ts> ...Vs> struct B {
B() {
}
};
};
template<typename, int> using Int = int;
template<typename, short> using Char = char;
A<int, short>::B<Int, Char> b;
% g++-9.0.0-alpha20190120 -c rtzrooh4.cpp
rtzrooh4.cpp:10:27: internal compiler error: in tsubst_pack_expansion, at
cp/pt.c:12221
10 | A<int, short>::B<Int, Char> b;
| ^
0x63d616 tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:12221
0x9ef5bb coerce_template_parameter_pack
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:8121
0x9ef5bb coerce_template_parms
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:8411
0x9f08a1 coerce_innermost_template_parms
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:8619
0x9fcaaa lookup_template_class_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:9324
0x9fcaaa lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/pt.c:9683
0xa29c8b finish_template_type(tree_node*, tree_node*, int)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/semantics.c:3255
0x9a4aad cp_parser_template_id
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:16406
0x9a4c66 cp_parser_class_name
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:23127
0x9a8b42 cp_parser_qualifying_entity
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:6683
0x9a8b42 cp_parser_nested_name_specifier_opt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:6369
0x99c9ab cp_parser_constructor_declarator_p
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:27312
0x99c9ab cp_parser_decl_specifier_seq
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:14038
0x99d2a4 cp_parser_simple_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:13354
0x9c2c10 cp_parser_declaration
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:13173
0x9c33a0 cp_parser_translation_unit
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:4698
0x9c33a0 c_parse_file()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/cp/parser.c:41003
0xaccdab c_common_parse_file()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190120/work/gcc-9-20190120/gcc/c-family/c-opts.c:1155
