Subject: [PATCH 6/7] weak-table: 'rob_from_rich' accounts for disappeared entries.

From: Ludovic Courtès <[email-masked]>
Date: Tue, 3 Oct 2017 13:43:51 +0200

* libguile/weak-table.c (rob_from_rich): Leave the loop also if 'key' or
'value' is zero.  Reset 'hash'.
---
 libguile/weak-table.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libguile/weak-table.c b/libguile/weak-table.c
index 5c4b3d30a..24fff4e73 100644
--- a/libguile/weak-table.c
+++ b/libguile/weak-table.c
@@ -292,7 +292,11 @@ rob_from_rich (scm_t_weak_table *table, unsigned long k)
   empty = k;
   do 
     empty = (empty + 1) % size;
-  while (table->entries[empty].hash);
+  while (table->entries[empty].hash
+	 && table->entries[empty].key
+	 && table->entries[empty].value);
+
+  table->entries[empty].hash = 0;
 
   do
     {
-- 
2.14.2