https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111890
Harry Butterworth <heb1001 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |heb1001 at gmail dot com
--- Comment #6 from Harry Butterworth <heb1001 at gmail dot com> ---
I have hit this bug, I think. My simplified test case as follows:
struct O {};
template<class E>
struct A
{
struct B
{
template<int F> struct C;
template<int F> requires ( F == 0 )
struct C<F>
{
template<class G> struct D {};
};
template<int F> requires ( F > 0 )
struct C<F> : public C<F - 1>
{
template<class G> struct D : public C<F - 1>::D<G>
{
friend O & operator << ( O & o, D const & d ) { return o; }
};
};
};
};
int main()
{
A<int>::B::C<1>::D<int> d;
return 0;
}
~$ /usr/local/gcc-14.1.0/bin/g++-14.1.0 --std=c++20 try.cc
try.cc: In instantiation of ‘struct A<int>::B::C<1>::D<int>’:
try.cc:29:29: required from here
29 | A<int>::B::C<1>::D<int> d;
| ^
try.cc:21:28: internal compiler error: Segmentation fault
21 | friend O & operator << ( O & o, D const & d ) { return
o; }
| ^~~~~~~~
0xf001ef crash_signal
../.././gcc/toplev.cc:319
0x7fcc3f1ce51f ???
./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x92b9f0 tsubst_friend_function
../.././gcc/cp/pt.cc:11468
0x92b9f0 instantiate_class_template(tree_node*)
../.././gcc/cp/pt.cc:12679
0x9671ed complete_type(tree_node*)
../.././gcc/cp/typeck.cc:138
0x7e737b start_decl_1(tree_node*, bool)
../.././gcc/cp/decl.cc:6184
0x802d89 start_decl_1(tree_node*, bool)
../.././gcc/cp/decl.cc:6150
0x802d89 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
../.././gcc/cp/decl.cc:6150
0x8e177d cp_parser_init_declarator
../.././gcc/cp/parser.cc:23486
0x8b81a4 cp_parser_simple_declaration
../.././gcc/cp/parser.cc:15900
0x8dc9d0 cp_parser_declaration_statement
../.././gcc/cp/parser.cc:14936
0x8e3878 cp_parser_statement
../.././gcc/cp/parser.cc:12892
0x8bb007 cp_parser_statement_seq_opt
../.././gcc/cp/parser.cc:13418
0x8bb20f cp_parser_compound_statement
../.././gcc/cp/parser.cc:13272
0x8dcacd cp_parser_function_body
../.././gcc/cp/parser.cc:25987
0x8dcacd cp_parser_ctor_initializer_opt_and_function_body
../.././gcc/cp/parser.cc:26038
0x8e132e cp_parser_function_definition_after_declarator
../.././gcc/cp/parser.cc:32730
0x8e247a cp_parser_function_definition_from_specifiers_and_declarator
../.././gcc/cp/parser.cc:32647
0x8e247a cp_parser_init_declarator
../.././gcc/cp/parser.cc:23366
0x8b81a4 cp_parser_simple_declaration
../.././gcc/cp/parser.cc:15900
