This originated from the editorial issues #4863 and #4869.

Some Throws: elements are specified to throw the exceptions an evaluation of E exits with. This wording excludes exceptions thrown involving the initialization and destruction of parameters of E, temporaries of E, and the destruction of the result of E.

The proposed wording below fixes this with front matter. As if affects more than just Throws: elements, it talks about requirements and guarantees when E exits via an exception.

As noted in the originating editorial issues, some LWG members prefer fixing each individual case of wording used to describe exception propagation rather than patching them up with front matter.