Don't abort when ralloc.c:relinquish cannot return a heap to the system.

 src/ralloc.c (relinquish): If a heap is ready to be relinquished,
 but it still has blocs in it, don't return it to the system,
 instead of aborting.  (Bug#12402)

1 files changed, 3 insertions, 2 deletions

diff --git a/src/ralloc.c b/src/ralloc.c
index e4a8fe9c6da..11897411930 100644
--- a/src/ralloc.c
+++ b/src/ralloc.c
@@ -327,10 +327,11 @@ relinquish (void)
 
       if ((char *)last_heap->end - (char *)last_heap->bloc_start <= excess)
         {
-          /* This heap should have no blocs in it.  */
+          /* This heap should have no blocs in it.  If it does, we
+             cannot return it to the system.  */
           if (last_heap->first_bloc != NIL_BLOC
               || last_heap->last_bloc != NIL_BLOC)
-            emacs_abort ();
+            return;
 
           /* Return the last heap, with its header, to the system.  */
           excess = (char *)last_heap->end - (char *)last_heap->start;