http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59111
Bug ID: 59111
Summary: [4.9 Regression] [c++11] ICE on invalid usage of auto
in return type
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: reichelt at gcc dot gnu.org
The following invalid code snippet (compiled with "-std=c++11") triggers an ICE
on trunk:
=====================
auto& foo();
int i = foo();
=====================
bug.cc:1:11: warning: 'foo' function uses 'auto' type specifier without
trailing return type [enabled by default]
auto& foo();
^
bug.cc:3:13: internal compiler error: tree check: expected record_type or
union_type or qual_union_type, have template_type_parm in lookup_conversions,
at cp/search.c:2509
int i = foo();
^
0xd3a614 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9166
0x6bd9f7 tree_check3
../../gcc/gcc/tree.h:2746
0x6bd9f7 lookup_conversions(tree_node*)
../../gcc/gcc/cp/search.c:2509
0x5493a6 build_user_type_conversion_1
../../gcc/gcc/cp/call.c:3447
0x54a3c1 implicit_conversion
../../gcc/gcc/cp/call.c:1756
0x54ff6c can_convert_arg_bad(tree_node*, tree_node*, tree_node*, int, int)
../../gcc/gcc/cp/call.c:8960
0x677940 convert_for_assignment
../../gcc/gcc/cp/typeck.c:7992
0x5eff71 digest_init_r
../../gcc/gcc/cp/typeck2.c:1009
0x5f1dc2 digest_init_flags
../../gcc/gcc/cp/typeck2.c:1078
0x5f1dc2 store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/gcc/cp/typeck2.c:766
0x566066 check_initializer
../../gcc/gcc/cp/decl.c:5739
0x57909d cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc/gcc/cp/decl.c:6358
0x666c11 cp_parser_init_declarator
../../gcc/gcc/cp/parser.c:16727
0x66837f cp_parser_simple_declaration
../../gcc/gcc/cp/parser.c:11118
0x64c7b0 cp_parser_block_declaration
../../gcc/gcc/cp/parser.c:10999
0x670477 cp_parser_declaration
../../gcc/gcc/cp/parser.c:10896
0x66f198 cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:10782
0x670a3a cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4010
0x670a3a c_parse_file()
../../gcc/gcc/cp/parser.c:31187
0x791cd3 c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1055
Please submit a full bug report, [etc.]
