https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84854
Bug ID: 84854
Summary: [7/8 Regression] ICE: unexpected expression in
cxx_eval_constant_expression, at cp/constexpr.c:4774
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Changed between 20160807 and 20160814 :
$ cat z1.cc
template <typename> void a() {
if constexpr(a) { };
}
$ gcc-8-20180311 -c z1.cc
z1.cc: In function 'void a()':
z1.cc:2:6: warning: 'if constexpr' only available with -std=c++17 or
-std=gnu++17
if constexpr(a) { };
^~~~~~~~~
z1.cc:2:17: internal compiler error: unexpected expression 'a' of kind overload
if constexpr(a) { };
^
0x6a506d cxx_eval_constant_expression
../../gcc/cp/constexpr.c:4774
0x6a67fc cxx_eval_outermost_constant_expr
../../gcc/cp/constexpr.c:4833
0x793945 finish_if_stmt_cond(tree_node*, tree_node*)
../../gcc/cp/semantics.c:739
0x737e93 cp_parser_selection_statement
../../gcc/cp/parser.c:11393
0x737e93 cp_parser_statement
../../gcc/cp/parser.c:10816
0x7387a7 cp_parser_statement_seq_opt
../../gcc/cp/parser.c:11274
0x73887f cp_parser_compound_statement
../../gcc/cp/parser.c:11228
0x74a37e cp_parser_function_body
../../gcc/cp/parser.c:21778
0x74a37e cp_parser_ctor_initializer_opt_and_function_body
../../gcc/cp/parser.c:21813
0x74ab40 cp_parser_function_definition_after_declarator
../../gcc/cp/parser.c:26828
0x74dce6 cp_parser_function_definition_from_specifiers_and_declarator
../../gcc/cp/parser.c:26745
0x74dce6 cp_parser_init_declarator
../../gcc/cp/parser.c:19502
0x74e0cf cp_parser_single_declaration
../../gcc/cp/parser.c:27284
0x74e1bc cp_parser_template_declaration_after_parameters
../../gcc/cp/parser.c:26886
0x74e82c cp_parser_explicit_template_declaration
../../gcc/cp/parser.c:27124
0x74e82c cp_parser_template_declaration_after_export
../../gcc/cp/parser.c:27142
0x757929 cp_parser_declaration
../../gcc/cp/parser.c:12729
0x756356 cp_parser_declaration_seq_opt
../../gcc/cp/parser.c:12656
0x75665f cp_parser_translation_unit
../../gcc/cp/parser.c:4561
0x75665f c_parse_file()
../../gcc/cp/parser.c:39005
