patch 9.0.0949: crash when unletting a variable while listing variablesv9.0.0949

Problem:    Crash when unletting a variable while listing variables.
Solution:   Disallow changing a hashtable while going over the entries.
            (closes #11435)

1 files changed, 3 insertions, 2 deletions

diff --git a/src/proto/hashtab.pro b/src/proto/hashtab.pro
index 21794ed6fd..320889edce 100644
--- a/src/proto/hashtab.pro
+++ b/src/proto/hashtab.pro
@@ -1,13 +1,14 @@
 /* hashtab.c */
 void hash_init(hashtab_T *ht);
+int check_hashtab_frozen(hashtab_T *ht, char *command);
 void hash_clear(hashtab_T *ht);
 void hash_clear_all(hashtab_T *ht, int off);
 hashitem_T *hash_find(hashtab_T *ht, char_u *key);
 hashitem_T *hash_lookup(hashtab_T *ht, char_u *key, hash_T hash);
 void hash_debug_results(void);
-int hash_add(hashtab_T *ht, char_u *key);
+int hash_add(hashtab_T *ht, char_u *key, char *command);
 int hash_add_item(hashtab_T *ht, hashitem_T *hi, char_u *key, hash_T hash);
-void hash_remove(hashtab_T *ht, hashitem_T *hi);
+int hash_remove(hashtab_T *ht, hashitem_T *hi, char *command);
 void hash_lock(hashtab_T *ht);
 void hash_lock_size(hashtab_T *ht, int size);
 void hash_unlock(hashtab_T *ht);