[Bug libstdc++/64535] Emergency buffer for exception allocation too small

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64535

--- Comment #28 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Thibaut M. from comment #27)
> A patch could be a least to avoid this `malloc` with some `#define` options?

That discussion belongs in PR 68606.