yuan
--- a/crates/tor-circmgr/src/timeouts/pareto.rs
+++ b/crates/tor-circmgr/src/timeouts/pareto.rs
    fn note_circ_timeout(&mut self, hop: u8, delay: Duration) {
        // Only record this timeout if we have seen some network activity since
        // we launched the circuit.
-        let last_traffic = tor_proto::time_since_last_incoming_traffic();
-        let have_seen_recent_activity = last_traffic < delay;
+        let have_seen_recent_activity =
+            if let Some(last_traffic) = tor_proto::time_since_last_incoming_traffic() {
+                last_traffic < delay
+            } else {
+                true
--- a/crates/tor-guardmgr/src/lib.rs
+++ b/crates/tor-guardmgr/src/lib.rs
        // we don't mark all the primary guards as retriable unless
        // we've been forced to non-primary guards.
-        let net_has_been_down = inner
-            .guards
-            .active_guards_mut()
-            .all_primary_guards_are_unreachable()
-            && tor_proto::time_since_last_incoming_traffic() >= inner.params.internet_down_timeout;
+        let net_has_been_down =
+            if let Some(duration) = tor_proto::time_since_last_incoming_traffic() {
+                inner
+                    .guards
+                    .active_guards_mut()
+                    .all_primary_guards_are_unreachable()
+                    && duration >= inner.params.internet_down_timeout
+            } else {
+                false