bug#56793: Infinite loop in pure_alloc when dumping strings longer than 10K bytes

[Lynn Winebarger]

On Wed, Jul 27, 2022 at 10:00 AM Pip Cet <pipcet@gmail.com> wrote:
>
> On Wed, Jul 27, 2022 at 1:51 PM Lynn Winebarger <owinebar@gmail.com> wrote:
> > I apologize for not being able to include significant details of the build, 
> > as this is happening on a sandboxed system in a proprietary context.
> > I've been attempting to dump emacs built from the 28.1 tarball with a large 
> > number of core libraries preloaded.  I have observed runaway allocation 
> > when attempting to dump with native-compilation enabled and with 
> > native-compilation disabled.
>
> I believe this is a duplicate of #46916, which was closed as WONTFIX.
> (https://debbugs.gnu.org/cgi/bugreport.cgi?bug=46916) There's a patch
> there, IIRC.
>
True, but the triggering issue doesn't really seem to be pure space
exhaustion per se.  Nominal pure space exhaustion doesn't even seem to
prevent producing a portable dump file - unless the object is over 10K
bytes in size.

I understand the long-term solution, but in the meantime we should
still be able to dump emacs with additional files without runaway
allocation.

Lynn