[Bug c++/58170] [4.7/4.8/4.9 Regression] [c++11] Crash when aliasing a template class that is a member of its template base class.

["reichelt at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58170

--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Stack trace on trunk:

bug.cc: In substitution of 'template<class T, class U, class V> using B = A<
<template-parameter-1-1>, <template-parameter-1-2> >::B<V> [with T = T; U =
char; V = bool]':
bug.cc:10:18:   required from here
bug.cc:6:70: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have template_decl in lookup_template_class_1,
at cp/pt.c:7674
 template <typename T, typename U, typename V> using B = A<T, U>::B<V>;
                                                                      ^
0xdbfc54 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        ../../gcc/gcc/tree.c:9192
0x5bc4c9 tree_check3(tree_node*, char const*, int, char const*, tree_code,
tree_code, tree_code)
        ../../gcc/gcc/tree.h:2749
0x62520c lookup_template_class_1
        ../../gcc/gcc/cp/pt.c:7674
0x62520c lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
        ../../gcc/gcc/cp/pt.c:7725
0x6296d3 tsubst_aggr_type
        ../../gcc/gcc/cp/pt.c:10031
0x61ba51 tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/gcc/cp/pt.c:11436
0x62dbee tsubst_decl
        ../../gcc/gcc/cp/pt.c:10908
0x61beff tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/gcc/cp/pt.c:11357
0x632e4d instantiate_template_1
        ../../gcc/gcc/cp/pt.c:15325
0x632e4d instantiate_template(tree_node*, tree_node*, int)
        ../../gcc/gcc/cp/pt.c:15375
0x61c02d instantiate_alias_template
        ../../gcc/gcc/cp/pt.c:15405
0x61c02d tsubst(tree_node*, tree_node*, int, tree_node*)
        ../../gcc/gcc/cp/pt.c:11384
0x62435f lookup_template_class_1
        ../../gcc/gcc/cp/pt.c:7499
0x62435f lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
        ../../gcc/gcc/cp/pt.c:7725
0x72dcc2 finish_template_type(tree_node*, tree_node*, int)
        ../../gcc/gcc/cp/semantics.c:2953
0x6c2078 cp_parser_template_id
        ../../gcc/gcc/cp/parser.c:13440
0x6c2398 cp_parser_class_name
        ../../gcc/gcc/cp/parser.c:19074
0x6b3bc9 cp_parser_qualifying_entity
        ../../gcc/gcc/cp/parser.c:5524
0x6b3bc9 cp_parser_nested_name_specifier_opt
        ../../gcc/gcc/cp/parser.c:5249
0x6cba77 cp_parser_simple_type_specifier
        ../../gcc/gcc/cp/parser.c:14638
Please submit a full bug report, [etc.]