[Bug middle-end/61199] [trans-mem] _cxa_free_exception is not transaction safe

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61199

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Since we have a TM wrapper for __cxa_allocate_exception, it seems reasonable to
have one for __cxa_free_exception as well.

In the testcase, we free the allocated 'bar' exception when the copy
constructor throws an 'int' exception, and then the 'int' exception propagates
out of foo.