https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88419
Bug ID: 88419
Summary: [9 Regression] [ICE] "Same canonical type node for
different types" for CTAD in noexcept
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Casey at Carter dot net
Target Milestone: ---
Created attachment 45191
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45191&action=edit
Repro
This TU:
template<class> struct ref_view {
template<class T> ref_view(T&&);
};
template<class R> ref_view(R&) -> ref_view<R>;
struct ref_fn {
template<class R> auto operator()(R r) const
noexcept(noexcept(ref_view{r}));
};
template<class R> struct indirect_view {
indirect_view(R);
};
struct indirect_fn {
template<class R> auto operator()(R r) const
noexcept(noexcept(indirect_view{r}));
};
ICEs when compiled with "g++ -std=c++17 -c":
/home/casey/casey/Desktop/repro.cpp:18:40: internal compiler error: same
canonical type node for different types ‘indirect_view’ and ‘ref_view’
18 | noexcept(noexcept(indirect_view{r}));
| ^
0x9fd2af comptypes(tree_node*, tree_node*, int)
/home/casey/repos/gcc/gcc/cp/typeck.c:1486
0x9f3076 cp_tree_equal(tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/tree.c:3558
0x9f3d6f cp_tree_equal(tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/tree.c:3816
0x9e3772 cp_check_qualified_type
/home/casey/repos/gcc/gcc/cp/tree.c:2135
0x9e7557 build_cp_fntype_variant(tree_node*, cp_ref_qualifier, tree_node*,
bool)
/home/casey/repos/gcc/gcc/cp/tree.c:2568
0x9e7647 build_cp_fntype_variant(tree_node*, cp_ref_qualifier, tree_node*,
bool)
/home/casey/repos/gcc/gcc/cp/tree.c:2599
0x8b9aeb grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
/home/casey/repos/gcc/gcc/cp/decl.c:11527
0x8caa3e grokfield(cp_declarator const*, cp_decl_specifier_seq*, tree_node*,
bool, tree_node*, tree_node*)
/home/casey/repos/gcc/gcc/cp/decl2.c:814
0x95b2f1 cp_parser_init_declarator
/home/casey/repos/gcc/gcc/cp/parser.c:20306
0x95ef04 cp_parser_single_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:27954
0x95f04c cp_parser_template_declaration_after_parameters
/home/casey/repos/gcc/gcc/cp/parser.c:27546
0x95f98d cp_parser_explicit_template_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:27792
0x95f98d cp_parser_template_declaration_after_export
/home/casey/repos/gcc/gcc/cp/parser.c:27811
0x960cbd cp_parser_member_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:24070
0x93b07a cp_parser_member_specification_opt
/home/casey/repos/gcc/gcc/cp/parser.c:23997
0x93b07a cp_parser_class_specifier_1
/home/casey/repos/gcc/gcc/cp/parser.c:23141
0x93d049 cp_parser_class_specifier
/home/casey/repos/gcc/gcc/cp/parser.c:23403
0x93d049 cp_parser_type_specifier
/home/casey/repos/gcc/gcc/cp/parser.c:17259
0x93e03b cp_parser_decl_specifier_seq
/home/casey/repos/gcc/gcc/cp/parser.c:13982
0x93e773 cp_parser_simple_declaration
/home/casey/repos/gcc/gcc/cp/parser.c:13287
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
