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[Bug c++/80639] New: ICE on valid C++11 code: in cxx_eval_outermost_constant_expr, at cp/constexpr.c:4642
- From: "su at cs dot ucdavis.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 05 May 2017 07:43:40 +0000
- Subject: [Bug c++/80639] New: ICE on valid C++11 code: in cxx_eval_outermost_constant_expr, at cp/constexpr.c:4642
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80639
Bug ID: 80639
Summary: ICE on valid C++11 code: in
cxx_eval_outermost_constant_expr, at
cp/constexpr.c:4642
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It seems to be a recent regression.
$ g++-trunk -v
Using built-in specs.
COLLECT_GCC=g++-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170505 (experimental) [trunk revision 247627] (GCC)
$
$ g++-6.2 -c small.cpp
$
$ g++-trunk -c small.cpp
small.cpp: In instantiation of ‘constexpr void (A<B>::* const A<B>::h)()<0>’:
small.cpp:19:3: required from ‘static void B::K<<anonymous> >::n() [with int
<anonymous> = 0]’
small.cpp:7:24: required from here
small.cpp:13:41: internal compiler error: in cxx_eval_outermost_constant_expr,
at cp/constexpr.c:4642
template < int u > static constexpr T h = &B::m < u >;
^
0x8e50dd cxx_eval_outermost_constant_expr
../../gcc-source-trunk/gcc/cp/constexpr.c:4641
0x74e6dc store_init_value(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
../../gcc-source-trunk/gcc/cp/typeck2.c:827
0x6a27a2 check_initializer
../../gcc-source-trunk/gcc/cp/decl.c:6363
0x6cf7dd cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl.c:7035
0x6f456a instantiate_decl(tree_node*, bool, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22697
0x787af7 maybe_instantiate_decl
../../gcc-source-trunk/gcc/cp/decl2.c:5012
0x789539 mark_used(tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl2.c:5108
0x733853 lookup_and_finish_template_variable(tree_node*, tree_node*, int)
../../gcc-source-trunk/gcc/cp/pt.c:9090
0x702eb6 tsubst_qualified_id
../../gcc-source-trunk/gcc/cp/pt.c:14358
0x7045ee tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../../gcc-source-trunk/gcc/cp/pt.c:16879
0x6f7b47 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:16467
0x6f8f3e tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15732
0x6f753b tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15718
0x6f8343 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-source-trunk/gcc/cp/pt.c:15944
0x6f57a4 instantiate_decl(tree_node*, bool, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22898
0x7456d2 instantiate_pending_templates(int)
../../gcc-source-trunk/gcc/cp/pt.c:23019
0x78b0f1 c_parse_final_cleanups()
../../gcc-source-trunk/gcc/cp/decl2.c:4526
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
----------------------------------------------------------
template < typename > struct A;
struct B
{
template < int > void m ();
template < int > struct K { static void n (); };
void p () { K < 0 >::n (); }
};
template <> struct A < B >
{
using T = void (A::*)();
template < int u > static constexpr T h = &B::m < u >;
};
template < int v > void B::K < v >::n ()
{
using S = A < B >;
S::h < 0 >;
}