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

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

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

--- Comment #26 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 27 Jan 2015, redi at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64535
> 
> --- Comment #25 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to rguenther@suse.de from comment #18)
> > But again - where can you catch exceptions thrown from global
> > initializers / destructors?
> 
> Within those global constructors/destructors themselves:
> 
> struct Global {
>   ~Global() {
>     try {
>       throw 1;
>     } catch (...) {
>     }
>   }
> } global;
> 
> Anyway, we should probably use an init_priority for the pool, because as well
> as an order of destruction problem it's possible for a global constructor to
> try to use the pool, and that must not happen before it has been initialized by
> the constructor.

Of course that's broken in older releases as well because of the
emergency_mutex being dynamically constructed.