bug#37006: 27.0.50; garbage collection not happening after 26de2d42

[Eli Zaretskii]

> From: Joseph Mingrone <jrm@ftfl.ca>
> Date: Sun, 11 Aug 2019 09:39:58 -0300
> 
> After 26de2d42 from 2019-06-20, garbage collection is not happening and
> allocated memory continues to grow until
> 
> Aug 10 21:39:02 <kern.err> phe kernel: pid 73800 (emacs-27.0.50), uid
> 1001, was killed: out of swap space
> 
> and
> 
> Aug 10 21:39:07 <kern.crit> phe kernel: swap_pager_getswapspace(3):
> failed

I see this on GNU/Linux, but not on MS-Windows, FWIW.