https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71126
Bug ID: 71126
Summary: [concepts] ICE on ill-formed code declaring a variable
with a non-type concept
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tom at honermann dot net
CC: andrew.n.sutton at gmail dot com, asutton at gcc dot gnu.org
Target Milestone: ---
The following ill-formed code triggers an ICE in gcc r236239.
$ cat t.cpp
template<int N>
concept bool C = N==1;
C c = 1;
$ svn info
Path: .
Working Copy Root Path: /home/tom/src/gcc-trunk
URL: svn://gcc.gnu.org/svn/gcc/trunk
Relative URL: ^/trunk
Repository Root: svn://gcc.gnu.org/svn/gcc
Repository UUID: 138bc75d-0d04-0410-961f-82ee72b054a4
Revision: 236239
Node Kind: directory
Schedule: normal
Last Changed Author: uros
Last Changed Rev: 236238
Last Changed Date: 2016-05-14 05:07:13 -0400 (Sat, 14 May 2016)
$ g++ --version
g++ (GCC) 7.0.0 20160514 (experimental)
...
$ g++ -c -std=c++1z -fconcepts t.cpp
t.cpp:3:7: internal compiler error: tree check: expected tree_vec, have
error_mark in tsubst, at cp/pt.c:12954
C c = 1;
^
0xff7e0c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc-trunk/gcc/tree.c:9753
0x6bd076 tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc-trunk/gcc/tree.h:3025
0x6bd076 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc-trunk/gcc/cp/pt.c:12954
0x6b1a78 tsubst_copy
../../gcc-trunk/gcc/cp/pt.c:14077
0x6b787a tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-trunk/gcc/cp/pt.c:17161
0x6b720b tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-trunk/gcc/cp/pt.c:16176
0x6abfee tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-trunk/gcc/cp/pt.c:15800
0x889617 satisfy_predicate_constraint
../../gcc-trunk/gcc/cp/constraint.cc:1768
0x889617 satisfy_constraint_1
../../gcc-trunk/gcc/cp/constraint.cc:1975
0x88a416 satisfy_constraint
../../gcc-trunk/gcc/cp/constraint.cc:2026
0x6deb08 lookup_and_finish_template_variable
../../gcc-trunk/gcc/cp/pt.c:8715
0x6b87c2 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-trunk/gcc/cp/pt.c:15991
0x6abfee tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-trunk/gcc/cp/pt.c:15800
0x889617 satisfy_predicate_constraint
../../gcc-trunk/gcc/cp/constraint.cc:1768
0x889617 satisfy_constraint_1
../../gcc-trunk/gcc/cp/constraint.cc:1975
0x88a416 satisfy_constraint
../../gcc-trunk/gcc/cp/constraint.cc:2026
0x88b694 constraints_satisfied_p(tree_node*, tree_node*)
../../gcc-trunk/gcc/cp/constraint.cc:2146
0x6eaf3a do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context)
../../gcc-trunk/gcc/cp/pt.c:24065
0x67a9bb cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc-trunk/gcc/cp/decl.c:6606
0x77e62f cp_parser_init_declarator
../../gcc-trunk/gcc/cp/parser.c:18694
...
