https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85545
Bug ID: 85545
Summary: [8/9 Regression] ICE with static_cast of
pointer-to-member-function
Product: gcc
Version: 8.0.1
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
CC: jakub at gcc dot gnu.org, rguenth at gcc dot gnu.org
Target Milestone: ---
The following valid code snippet (compiled with "-std=c++17 -Wformat"
or "-std=c++17 -Wall") triggers an ICE with the GCC 8 release candidate
and on trunk:
==============================================
struct A
{
void foo() noexcept;
};
template<typename T> void bar(T);
void baz()
{
bar(static_cast<void(A::*)()>(&A::foo));
}
==============================================
bug.cc: In function 'void baz()':
bug.cc:10:41: internal compiler error: in fold_convert_loc, at
fold-const.c:2524
bar(static_cast<void(A::*)()>(&A::foo));
^
0x6c4cf4 fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../gcc/gcc/fold-const.c:2524
0x87539c cp_fold_convert(tree_node*, tree_node*)
../../gcc/gcc/cp/cvt.c:612
0x859760 cxx_eval_constant_expression
../../gcc/gcc/cp/constexpr.c:4613
0x85d0b7 cxx_eval_outermost_constant_expr
../../gcc/gcc/cp/constexpr.c:4861
0x85fed6 maybe_constant_value(tree_node*, tree_node*)
../../gcc/gcc/cp/constexpr.c:5079
0x821a5b build_over_call
../../gcc/gcc/cp/call.c:8078
0x82f1bf build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc/gcc/cp/call.c:4319
0x9ade95 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../../gcc/gcc/cp/semantics.c:2534
0x938e2a cp_parser_postfix_expression
../../gcc/gcc/cp/parser.c:7235
0x939681 cp_parser_unary_expression
../../gcc/gcc/cp/parser.c:8317
0x9194ef cp_parser_cast_expression
../../gcc/gcc/cp/parser.c:9085
0x919cfa cp_parser_binary_expression
../../gcc/gcc/cp/parser.c:9186
0x91b534 cp_parser_assignment_expression
../../gcc/gcc/cp/parser.c:9481
0x91bc38 cp_parser_expression
../../gcc/gcc/cp/parser.c:9650
0x91d918 cp_parser_expression_statement
../../gcc/gcc/cp/parser.c:11132
0x923d4d cp_parser_statement
../../gcc/gcc/cp/parser.c:10936
0x9252c0 cp_parser_statement_seq_opt
../../gcc/gcc/cp/parser.c:11275
0x925397 cp_parser_compound_statement
../../gcc/gcc/cp/parser.c:11229
0x93bfa0 cp_parser_function_body
../../gcc/gcc/cp/parser.c:21802
0x93bfa0 cp_parser_ctor_initializer_opt_and_function_body
../../gcc/gcc/cp/parser.c:21839
Please submit a full bug report, [etc.]
This is a very recent regression, introduced between 2018-04-22
and the release candidate.
Jakub, I think this is related to your commit, r259629.
I also think that this might qualify as release blocker.
