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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/101029] unexpected error: non-constant condition for static assertion in gcc 10/11, but not 9 (clang also fine)
Date: Fri, 11 Jun 2021 13:41:36 +0000 [thread overview]
Message-ID: <bug-101029-4-jCL78Tfn5Y@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-101029-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101029
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 50985
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50985&action=edit
test-case
I see the following issue when not using an optimization level:
$ g++ gcc_issue.cc -c
gcc_issue.cc: In instantiation of ‘struct is_default_constructible<int>’:
gcc_issue.cc:10:8: required from ‘struct
__and_<is_default_constructible<int>, int, int>’
gcc_issue.cc:29:57: required by substitution of ‘template<class _U1, class
_U2, typename enable_if<__and_<is_default_constructible<_U1>, _U2,
int>::valuebool>::type <anonymous> > pair::pair() [with _U1 = int; _U2 = int;
typename enable_if<__and_<is_default_constructible<_U1>, _U2,
int>::valuebool>::type <anonymous> = <missing>]’
:126:31: required from here
gcc_issue.cc:18:43: error: non-constant condition for static assertion
18 | static_assert(__is_complete_or_unbounded(_Tp{}));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
gcc_issue.cc:18:43: in ‘constexpr’ expansion of
‘__is_complete_or_unbounded<int>(0).integral_constant<1>::operator
integral_constant<1>::value_type()’
gcc_issue.cc:18:43: internal compiler error: in cxx_eval_call_expression, at
cp/constexpr.c:2701
0x65e879 cxx_eval_call_expression
/home/marxin/Programming/gcc/gcc/cp/constexpr.c:2701
0x9a0489 cxx_eval_constant_expression
/home/marxin/Programming/gcc/gcc/cp/constexpr.c:6232
0x9acc6d cxx_eval_binary_expression
/home/marxin/Programming/gcc/gcc/cp/constexpr.c:3187
0x99f86a cxx_eval_constant_expression
/home/marxin/Programming/gcc/gcc/cp/constexpr.c:6590
0x9a3f47 cxx_eval_outermost_constant_expr
/home/marxin/Programming/gcc/gcc/cp/constexpr.c:7264
0xb955e9 finish_static_assert(tree_node*, tree_node*, unsigned int, bool, bool)
/home/marxin/Programming/gcc/gcc/cp/semantics.c:10306
0xb55ec3 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18644
0xb55ec3 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18096
0xb710e9 instantiate_class_template_1
/home/marxin/Programming/gcc/gcc/cp/pt.c:12009
0xb710e9 instantiate_class_template(tree_node*)
/home/marxin/Programming/gcc/gcc/cp/pt.c:12268
0xbbfe17 complete_type(tree_node*)
/home/marxin/Programming/gcc/gcc/cp/typeck.c:143
0xbbfe17 complete_type(tree_node*)
/home/marxin/Programming/gcc/gcc/cp/typeck.c:111
0xb7d116 lookup_member(tree_node*, tree_node*, int, bool, int,
access_failure_info*)
/home/marxin/Programming/gcc/gcc/cp/search.c:1148
0xabbe97 lookup_qualified_name(tree_node*, tree_node*, LOOK_want, bool)
/home/marxin/Programming/gcc/gcc/cp/name-lookup.c:7113
0xb366f9 tsubst_qualified_id
/home/marxin/Programming/gcc/gcc/cp/pt.c:16364
0xb3889b tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:19839
0xb54186 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:19082
0xb54186 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
/home/marxin/Programming/gcc/gcc/cp/pt.c:18096
0xb5bf55 tsubst_template_arg(tree_node*, tree_node*, int, tree_node*)
/home/marxin/Programming/gcc/gcc/cp/pt.c:12286
0xb5bf55 tsubst_template_arg(tree_node*, tree_node*, int, tree_node*)
/home/marxin/Programming/gcc/gcc/cp/pt.c:12274
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.
while -O is fine:
$ g++ gcc_issue.cc -c -O
next prev parent reply other threads:[~2021-06-11 13:41 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 12:04 [Bug c++/101029] New: " jim.w.walker at gmail dot com
2021-06-11 12:05 ` [Bug c++/101029] " jim.w.walker at gmail dot com
2021-06-11 12:17 ` marxin at gcc dot gnu.org
2021-06-11 12:22 ` redi at gcc dot gnu.org
2021-06-11 13:41 ` marxin at gcc dot gnu.org [this message]
2021-06-11 13:42 ` marxin at gcc dot gnu.org
2021-06-11 20:45 ` jason at gcc dot gnu.org
2021-06-11 22:20 ` [Bug c++/101029] [10/11/12 regression] " jason at gcc dot gnu.org
2021-06-12 16:40 ` cvs-commit at gcc dot gnu.org
2021-06-16 9:03 ` jim.w.walker at gmail dot com
2021-06-16 9:16 ` redi at gcc dot gnu.org
2021-06-16 18:33 ` cvs-commit at gcc dot gnu.org
2021-06-17 3:38 ` cvs-commit at gcc dot gnu.org
2021-06-17 3:39 ` cvs-commit at gcc dot gnu.org
2021-06-17 3:39 ` cvs-commit at gcc dot gnu.org
2021-07-06 6:49 ` rguenth at gcc dot gnu.org
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