[Bug libstdc++/109229] std::exclusive_scan narrows to initial value

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109229

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah yes, this issue is the subject of
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0571r2.html#intermediate_unordered
which is waiting for a new revision from the author.