https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97034
Bug ID: 97034
Summary: ICE on C++20 code: gcc_assert failure in return type
deduction (gcc/cp/pt.c:26984 in
type_dependent_expression_p(tree_node*))
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dimitri.gorokhovik at free dot fr
Target Milestone: ---
The code:
#include <tuple>
template <unsigned N>
struct s
{
template <typename R>
struct ss
{
R _1;
unsigned _2;
};
constexpr auto f ()
{
return ss { std::pair <char, int> { 'a', 1 }, 1 };
};
};
when compiled as:
g++ -std=c++20 -o bug-3.o -c bug-3.cpp
produces:
bug-3.cpp: In member function ‘constexpr auto s<N>::f()’:
bug-3.cpp:15:65: internal compiler error: in type_dependent_expression_p, at
cp/pt.c:26984
15 | return ss { std::pair <char, int> { 'a', 1 }, 1 };
| ^
0x680638 type_dependent_expression_p(tree_node*)
../../src/gcc/cp/pt.c:26984
0xa22cf9 maybe_instantiate_noexcept(tree_node*, int)
../../src/gcc/cp/pt.c:25290
0x9598c2 mark_used(tree_node*, int)
../../src/gcc/cp/decl2.c:5552
0xaa8d36 cp_build_addr_expr_1
../../src/gcc/cp/typeck.c:6384
0x8ab692 build_over_call
../../src/gcc/cp/call.c:8522
0x8ae85a build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../src/gcc/cp/call.c:4641
0xa1a4ed do_class_deduction
../../src/gcc/cp/pt.c:29027
0xa1a4ed do_auto_deduction(tree_node*, tree_node*, tree_node*, int,
auto_deduction_context, tree_node*, int)
../../src/gcc/cp/pt.c:29085
0xa6def9 finish_compound_literal(tree_node*, tree_node*, int, fcl_t)
../../src/gcc/cp/semantics.c:2934
0x9ca12a cp_parser_functional_cast
../../src/gcc/cp/parser.c:29690
0x9e26d7 cp_parser_postfix_expression
../../src/gcc/cp/parser.c:7251
0x9c443a cp_parser_binary_expression
../../src/gcc/cp/parser.c:9648
0x9c61ce cp_parser_assignment_expression
../../src/gcc/cp/parser.c:9953
0x9c64e2 cp_parser_expression
../../src/gcc/cp/parser.c:10121
0x9d5527 cp_parser_jump_statement
../../src/gcc/cp/parser.c:13192
0x9d5527 cp_parser_statement
../../src/gcc/cp/parser.c:11455
0x9d6a8d cp_parser_statement_seq_opt
../../src/gcc/cp/parser.c:11928
0x9d6b68 cp_parser_compound_statement
../../src/gcc/cp/parser.c:11878
0x9eecb5 cp_parser_function_body
../../src/gcc/cp/parser.c:23177
0x9eecb5 cp_parser_ctor_initializer_opt_and_function_body
../../src/gcc/cp/parser.c:23228
Please submit a full bug report,
GCC version:
g++ (GCC) 11.0.0 20200910 (experimental)
