Andreas Klebinger authored 2 years ago and Marge Bot committed 2 years ago

Workaround for #22255 which showed how treating large/compact regions
as pinned could cause segfaults.

Test Plan: New unit test

Reviewers: andrewthad, niteria, bgamari, erikd

Subscribers: rwbarton, thomie, carter

GHC Trac Issues: #14900

Differential Revision: https://phabricator.haskell.org/D4485