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[tor-commits] [tor/master] Avoid crashing if we call num_usable_bridges() when bridges are not enabled



commit d7833c9d27feed9e4d4d4d4b5920b5d17150b82d
Author: teor <teor2345@xxxxxxxxx>
Date:   Wed Nov 22 02:01:51 2017 +1100

    Avoid crashing if we call num_usable_bridges() when bridges are not enabled
    
    This applies the changes in 23524 to num_usable_bridges(), because it has
    replaced any_bridge_descriptors_known().
    
    The original changes file still applies.
---
 src/or/entrynodes.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c
index 826c0e48a..100286f10 100644
--- a/src/or/entrynodes.c
+++ b/src/or/entrynodes.c
@@ -3145,9 +3145,13 @@ num_bridges_usable,(void))
 {
   int n_options = 0;
 
-  tor_assert(get_options()->UseBridges);
+  if (BUG(!get_options()->UseBridges)) {
+    return 0;
+  }
   guard_selection_t *gs  = get_guard_selection_info();
-  tor_assert(gs->type == GS_TYPE_BRIDGE);
+  if (BUG(gs->type != GS_TYPE_BRIDGE)) {
+    return 0;
+  }
 
   SMARTLIST_FOREACH_BEGIN(gs->sampled_entry_guards, entry_guard_t *, guard) {
     if (guard->is_reachable == GUARD_REACHABLE_NO)



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