https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80244
Bug ID: 80244
Summary: [6/7 Regression] ICE with attribute in template alias
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
Target Milestone: ---
The following code snippet triggers an ICE since GCC 6.1.0:
======================================================================
template<typename> struct A {};
template<typename T> using B = A<__underlying_type(T) [[gnu::aligned(4)]]>;
======================================================================
bug.cc:3:67: internal compiler error: in layout_type, at stor-layout.c:2386
template<typename T> using B = A<__underlying_type(T) [[gnu::aligned(4)]]>;
^
0xd5a9bf layout_type(tree_node*)
../../gcc/gcc/stor-layout.c:2386
0x1027845 type_hash_canon(unsigned int, tree_node*)
../../gcc/gcc/tree.c:7131
0x1027d2d build_type_attribute_qual_variant(tree_node*, tree_node*, int)
../../gcc/gcc/tree.c:4875
0x7ce47d cp_build_type_attribute_variant(tree_node*, tree_node*)
../../gcc/gcc/cp/tree.c:4156
0x7dd9f2 strip_typedefs(tree_node*, bool*)
../../gcc/gcc/cp/tree.c:1580
0x6478ac canonicalize_type_argument
../../gcc/gcc/cp/pt.c:7331
0x68db53 coerce_template_parms
../../gcc/gcc/cp/pt.c:8128
0x6947ea lookup_template_class_1
../../gcc/gcc/cp/pt.c:8664
0x6947ea lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../../gcc/gcc/cp/pt.c:9009
0x7a7a8d finish_template_type(tree_node*, tree_node*, int)
../../gcc/gcc/cp/semantics.c:3151
0x7308f4 cp_parser_template_id
../../gcc/gcc/cp/parser.c:15491
0x730b0f cp_parser_class_name
../../gcc/gcc/cp/parser.c:21949
0x72d572 cp_parser_qualifying_entity
../../gcc/gcc/cp/parser.c:6285
0x72d572 cp_parser_nested_name_specifier_opt
../../gcc/gcc/cp/parser.c:5971
0x732b23 cp_parser_simple_type_specifier
../../gcc/gcc/cp/parser.c:16822
0x7208ad cp_parser_type_specifier
../../gcc/gcc/cp/parser.c:16495
0x72f1e2 cp_parser_type_specifier_seq
../../gcc/gcc/cp/parser.c:20777
0x724e61 cp_parser_type_id_1
../../gcc/gcc/cp/parser.c:20623
0x72c4f0 cp_parser_type_id
../../gcc/gcc/cp/parser.c:20693
0x72c4f0 cp_parser_alias_declaration
../../gcc/gcc/cp/parser.c:18589
Please submit a full bug report, [etc.]
In GCC 5 and before the code was accepted.
