The backported commit fixes crashes when signals are delivered to
non-Scheme threads, including GC worker threads and threads
created by foreign libraries. This appears to have been the
cause of the intermittent test failures we have experienced.
* gnu/packages/patches/chez-scheme-backport-signal.patch: New patch.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/chez-scheme.scm (chez-scheme)[source]<patches>: Use it.
(chez-scheme-for-racket, chez-scheme): Enable tests.
Change-Id: Ifd87ca0d1707ef6ad067d883772a5b42803ead94
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
