Guarantee delivery of inotify special events

* src/inotify.c (inotifyevent_to_event): Always match events
that are not encompassed by IN_ALL_EVENTS and which the
documentation implies are always delivered to callbacks.

* test/src/inotify-tests.el (inotify-file-watch-stop-delivery):
New test.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/inotify.c b/src/inotify.c
index ff842ddc58c..c29d940c984 100644
--- a/src/inotify.c
+++ b/src/inotify.c
@@ -187,7 +187,10 @@ inotifyevent_to_event (Lisp_Object watch, struct inotify_event const *ev)
   uint32_t mask;
   CONS_TO_INTEGER (Fnth (make_fixnum (3), watch), uint32_t, mask);
 
-  if (! (mask & ev->mask))
+  if (! (mask & ev->mask)
+      /* These event types are supposed to be reported whether or not
+         they appeared in the ASPECT list when monitoring commenced.  */
+      && !(ev->mask & (IN_IGNORED | IN_Q_OVERFLOW | IN_ISDIR | IN_UNMOUNT)))
     return Qnil;
 
   if (ev->len > 0)