https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84139
Bug ID: 84139
Summary: C++17 Filesystem/Filesystem TS + cmcstl2 = GCC ICE
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: cjdb.ns at gmail dot com
Target Milestone: ---
## Summary
It is possible to cause an ICE on GCC 7 and GCC trunk with this simple example.
https://godbolt.org/g/RYBwaV. Please let me know if the issue should be
resubmitted for each version of GCC that it affects.
## GCC version
Version for bug report: GCC 7.2
Present on: GCC 7.1, GCC 7.2, GCC 7.3, GCC trunk
## System type
This has been observed on:
* g++-7 (Ubuntu 7.2.0-1ubuntu1~16.04) 7.2.0
* gcc.exe (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 7.2.0
## Command
g++-7 -fconcepts -std=c++17 -save-temps example.cpp -lstdc++fs
## Diagnostic (Ubuntu)
In file included from /usr/include/c++/7/bits/stl_algobase.h:65:0,
from /usr/include/c++/7/bits/char_traits.h:39,
from /usr/include/c++/7/string:40,
from /usr/include/c++/7/stdexcept:39,
from /usr/include/c++/7/array:39,
from /usr/include/c++/7/tuple:39,
from /usr/include/c++/7/functional:54,
from /usr/local/include/stl2/functional.hpp:16,
from /usr/local/include/stl2/detail/concepts/algorithm.hpp:15,
from /usr/local/include/stl2/concepts.hpp:16,
from /usr/local/include/experimental/ranges/concepts:12,
from example.cpp:1:
/usr/include/c++/7/bits/stl_iterator_base_types.h: In instantiation of ‘struct
std::iterator_traits<const
std::experimental::filesystem::v1::__cxx11::path::_Cmpt*>’:
/usr/include/c++/7/bits/stl_iterator.h:769:57: required from ‘class
__gnu_cxx::__normal_iterator<const
std::experimental::filesystem::v1::__cxx11::path::_Cmpt*,
std::vector<std::experimental::filesystem::v1::__cxx11::path::_Cmpt> >’
/usr/include/c++/7/experimental/bits/fs_path.h:752:33: required from here
/usr/include/c++/7/bits/stl_iterator_base_types.h:190:5: internal compiler
error: in finish_member_declaration, at cp/semantics.c:2976
{
^
0x68ffab finish_member_declaration(tree_node*)
../../src/gcc/cp/semantics.c:2976
0x5fefca instantiate_class_template_1
../../src/gcc/cp/pt.c:10663
0x5fefca instantiate_class_template(tree_node*)
../../src/gcc/cp/pt.c:10880
0x662305 complete_type(tree_node*)
../../src/gcc/cp/typeck.c:133
0x5e4961 tsubst(tree_node*, tree_node*, int, tree_node*)
../../src/gcc/cp/pt.c:14057
0x5f6d41 tsubst_decl
../../src/gcc/cp/pt.c:12899
0x5e3e6f tsubst(tree_node*, tree_node*, int, tree_node*)
../../src/gcc/cp/pt.c:13404
0x5fef75 instantiate_class_template_1
../../src/gcc/cp/pt.c:10596
0x5fef75 instantiate_class_template(tree_node*)
../../src/gcc/cp/pt.c:10880
0x662305 complete_type(tree_node*)
../../src/gcc/cp/typeck.c:133
0x5cea01 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
../../src/gcc/cp/decl.c:12043
0x61e302 grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
../../src/gcc/cp/decl2.c:806
0x63343b cp_parser_member_declaration
../../src/gcc/cp/parser.c:23419
0x633e0a cp_parser_member_specification_opt
../../src/gcc/cp/parser.c:22968
0x633e0a cp_parser_class_specifier_1
../../src/gcc/cp/parser.c:22121
0x635a61 cp_parser_class_specifier
../../src/gcc/cp/parser.c:22373
0x635a61 cp_parser_type_specifier
../../src/gcc/cp/parser.c:16446
0x63661c cp_parser_decl_specifier_seq
../../src/gcc/cp/parser.c:13349
0x657b41 cp_parser_simple_declaration
../../src/gcc/cp/parser.c:12664
0x658995 cp_parser_block_declaration
../../src/gcc/cp/parser.c:12611
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
