https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101271
Bug ID: 101271
Summary: [12 Regression] error: ‘static constexpr decltype ...
used before its definition
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: rejects-valid
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: redi at gcc dot gnu.org
Target Milestone: ---
Created attachment 51090
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51090&action=edit
test-case
It's a recent regression. The test-case comes from blender package:
$ g++ blender.ii -c
In file included from /usr/include/openvdb/tree/LeafBuffer.h:10,
from /usr/include/openvdb/tree/LeafNode.h:11,
from /usr/include/openvdb/tree/Tree.h:18,
from /usr/include/openvdb/Grid.h:12,
from /usr/include/openvdb/openvdb.h:12,
from
/home/abuild/rpmbuild/BUILD/blender-2.92.0/extern/mantaflow/preprocessed/fileio/iovdb.cpp:31:
/usr/include/tbb/atomic.h:21:141: note: ‘#pragma message: TBB Warning:
tbb/atomic.h is deprecated. For details, please see Deprecated Features
appendix in the TBB reference manual.’
In file included from /usr/include/openvdb/tools/PointPartitioner.h:26,
from /usr/include/openvdb/tools/PointIndexGrid.h:19,
from /usr/include/openvdb/points/PointConversion.h:15,
from
/home/abuild/rpmbuild/BUILD/blender-2.92.0/extern/mantaflow/preprocessed/fileio/iovdb.cpp:32:
/usr/include/tbb/task_scheduler_init.h:21:154: note: ‘#pragma message: TBB
Warning: tbb/task_scheduler_init.h is deprecated. For details, please see
Deprecated Features appendix in the TBB reference manual.’
In file included from /usr/include/c++/12/memory:76,
from /usr/include/tbb/tbb_stddef.h:452,
from /usr/include/tbb/blocked_range3d.h:20,
from
/home/abuild/rpmbuild/BUILD/blender-2.92.0/extern/mantaflow/preprocessed/kernel.h:23,
from
/home/abuild/rpmbuild/BUILD/blender-2.92.0/extern/mantaflow/preprocessed/grid.h:26,
from
/home/abuild/rpmbuild/BUILD/blender-2.92.0/extern/mantaflow/preprocessed/fileio/iovdb.cpp:25:
/usr/include/c++/12/bits/unique_ptr.h: In instantiation of ‘typename
std::add_lvalue_reference<_Tp>::type std::unique_ptr<_Tp [],
_Dp>::operator[](std::size_t) const [with _Tp = unsigned int; _Dp =
std::default_delete<unsigned int []>; typename
std::add_lvalue_reference<_Tp>::type = unsigned int&; std::size_t = long
unsigned int]’:
/usr/include/openvdb/tools/PointIndexGrid.h:447:20: required from here
/usr/include/c++/12/bits/unique_ptr.h:672:55: error: ‘static constexpr decltype
((sizeof (_Elt) != 0)) std::unique_ptr<_Tp [],
_Dp>::_S_nothrow_deref(std::size_t) [with _Ptr = unsigned int*; _Elt = unsigned
int; _Tp = unsigned int; _Dp = std::default_delete<unsigned int []>; decltype
((sizeof (_Elt) != 0)) = bool; std::size_t = long unsigned int]’ used before
its definition
