[Bug libstdc++/103630] [9/10/11/12 Regression] std::make_exception_ptr<T&>(t) is ill-formed
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Dec 9 23:29:35 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103630
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:
https://gcc.gnu.org/g:a1ca039fc0fe934ef36c25d8284e6e116bcaffa7
commit r12-5879-ga1ca039fc0fe934ef36c25d8284e6e116bcaffa7
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Thu Dec 9 13:54:39 2021 +0000
libstdc++: Fix std::exception_ptr regressions [PR103630]
This restores support for std::make_exception_ptr<E&> and for using
std::exception_ptr in C++98.
Because the new non-throwing implementation needs to use std::decay to
handle references the original throwing implementation is used for
C++98.
We also need to change the typeid expression so it doesn't yield the
dynamic type when the function parameter is a reference to a polymorphic
type. Otherwise the new exception object could be caught by any handler
matching the dynamic type, even though the actual exception object is
only a copy of the base class, sliced to the static type.
libstdc++-v3/ChangeLog:
PR libstdc++/103630
* libsupc++/exception_ptr.h (exception_ptr): Fix exception
specifications on inline definitions.
(make_exception_ptr): Decay the template parameter. Use typeid
of the static type.
* testsuite/18_support/exception_ptr/103630.cc: New test.
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