[Bug libstdc++/61645] forward_list::splice_after shall not throw exceptions

[daniel.kruegler at googlemail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61645

--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to lh_mouse from comment #2)
> Replace forward_list with list, splice_after with splice and before_begin
> with begin, all three static_assert's hold.

Presumably this provides an consistency argument, yes.