[Bug c++/95822] [coroutines] compiler internal error with local object with noexcept false destructor
cvs-commit at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Thu Feb 25 19:34:29 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95822
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Iain D Sandoe <iains@gcc.gnu.org>:
https://gcc.gnu.org/g:7005a50d0121954031a223ea5a6c57aaa7e3efd3
commit r11-7402-g7005a50d0121954031a223ea5a6c57aaa7e3efd3
Author: Iain Sandoe <iain@sandoe.co.uk>
Date: Tue Feb 16 09:07:32 2021 +0000
coroutines : Remove throwing_cleanup marks from the ramp [PR95822].
The FE contains a mechanism for cleaning up return expressions if a
function throws during the execution of cleanups prior to the return.
If the original function has a return value with a non-trivial DTOR
and the body contains a var with a DTOR that might throw, the function
decl is marked "throwing_cleanup".
However, we do not [in the coroutine ramp function, which is
synthesised], use any body var types with DTORs that might throw.
The original body [which will then contain the type with the throwing
DTOR] is transformed into the actor function which only contains void
returns, and is also wrapped in a try-catch block.
So (a) the 'throwing_cleanup' is no longer correct for the ramp and
(b) we do not need to transfer it to the actor which only contains
void returns.
gcc/cp/ChangeLog:
PR c++/95822
* coroutines.cc (morph_fn_to_coro): Unconditionally remove any
set throwing_cleanup marker.
gcc/testsuite/ChangeLog:
PR c++/95822
* g++.dg/coroutines/pr95822.C: New test.
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