https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106689
Bug ID: 106689
Summary: gcc crash while compiling a generic lambda
Product: gcc
Version: 12.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: janezz55 at gmail dot com
Target Milestone: ---
Reproducing the crash is easy, clone my repository:
https://github.com/user1095108/sq2
then compile:
g++ -std=c++20 -Ofast sq2.cpp -s -o sq2 -lsqlite3
In file included from sq2.cpp:5:
sq2.hpp: In instantiation of 'sq2::bind<>(std::unique_ptr<sqlite3_stmt,
detail::sqlite3_stmt_deleter>&, double&&, int&&) requires bool(sizeof ...
((sq2::bind::a ...)))::<lambda(std::index_sequence<J ...>)> [with auto ...J =
{0, 1}; std::index_sequence<J ...> = std::integer_sequence<long unsigned int,
0, 1>]':
sq2.hpp:172:6: required from 'auto sq2::bind(auto:26&&, auto:27&& ...)
requires bool(sizeof ... ((sq2::bind::a ...))) [with int I = 1; auto:26 =
std::unique_ptr<sqlite3_stmt, detail::sqlite3_stmt_deleter>&; auto:27 =
{double, int}]'
sq2.cpp:62:14: required from here
sq2.hpp:108:11: internal compiler error: trying to capture 'a#0' in
instantiation of generic lambda
108 | [&a, &r, s(detail::get(stmt))]() noexcept -> bool
| ^
0x19ea8d8 internal_error(char const*, ...)
???:0
0x71c477 add_capture(tree_node*, tree_node*, tree_node*, bool, bool)
???:0
0x71c4e3 add_default_capture(tree_node*, tree_node*, tree_node*)
???:0
0x7e224a tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7e0aca tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7f7957 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
???:0
0x7e205f tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7e05c7 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7e8cac tsubst_pack_expansion(tree_node*, tree_node*, int, tree_node*)
???:0
0x7dfea9 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7daf63 instantiate_decl(tree_node*, bool, bool)
???:0
0x6edadb mark_used(tree_node*, int)
???:0
0x68b81f build_op_call(tree_node*, vec<tree_node*, va_gc, vl_embed>**, int)
???:0
0x810e4d finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0x7e1e2c tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
???:0
0x7daf63 instantiate_decl(tree_node*, bool, bool)
???:0
0x6edadb mark_used(tree_node*, int)
???:0
0x68ad5b build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, int)
???:0
0x810680 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
???:0
0x7c79bc c_parse_file()
???:0
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.archlinux.org/> for instructions.
uname -a
Linux e5-2620v2 5.19.2-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 17 Aug 2022 13:48:51
+0000 x86_64 GNU/Linux
clang 14 also crashes. Amazing, but we don't care.
