diff --git a/core/src/nodes/listeners.rs b/core/src/nodes/listeners.rs
index 64441cfa..70767f52 100644
--- a/core/src/nodes/listeners.rs
+++ b/core/src/nodes/listeners.rs
@@ -188,7 +188,9 @@ where
                     if remaining == 0 { break }
                 }
                 Ok(Async::Ready(Some(ListenerEvent::Upgrade { upgrade, listen_addr, remote_addr }))) => {
-                    debug_assert!(listener.addresses.contains(&listen_addr));
+                    debug_assert!(listener.addresses.contains(&listen_addr),
+                        "Transport reported listen address {} not in the list: {:?}",
+                        listen_addr, listener.addresses);
                     self.listeners.push_front(listener);
                     return Async::Ready(ListenersEvent::Incoming {
                         upgrade,
@@ -197,6 +199,8 @@ where
                     })
                 }
                 Ok(Async::Ready(Some(ListenerEvent::NewAddress(a)))) => {
+                    debug_assert!(!listener.addresses.contains(&a),
+                        "Transport has reported address {} multiple times", a);
                     if !listener.addresses.contains(&a) {
                         listener.addresses.push(a.clone());
                     }
diff --git a/transports/tcp/Cargo.toml b/transports/tcp/Cargo.toml
index 4998fd59..9c37b834 100644
--- a/transports/tcp/Cargo.toml
+++ b/transports/tcp/Cargo.toml
@@ -2,7 +2,7 @@
 name = "libp2p-tcp"
 edition = "2018"
 description = "TCP/IP transport protocol for libp2p"
-version = "0.7.0"
+version = "0.7.2"
 authors = ["Parity Technologies <admin@parity.io>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"
diff --git a/transports/tcp/src/lib.rs b/transports/tcp/src/lib.rs
index 6441d2dc..5edfb442 100644
--- a/transports/tcp/src/lib.rs
+++ b/transports/tcp/src/lib.rs
@@ -49,7 +49,7 @@ use libp2p_core::{
     multiaddr::{Protocol, Multiaddr},
     transport::{ListenerEvent, TransportError}
 };
-use log::{debug, error};
+use log::{debug, error, trace};
 use std::{
     collections::{HashMap, VecDeque},
     fmt,
@@ -422,7 +422,7 @@ impl Stream for TcpListenStream {
 
             match apply_config(&self.config, &sock) {
                 Ok(()) => {
-                    debug!("Incoming connection from {}", remote_addr);
+                    trace!("Incoming connection from {} on {}", remote_addr, listen_addr);
                     self.pending.push_back(ListenerEvent::Upgrade {
                         upgrade: future::ok(TcpTransStream { inner: sock }),
                         listen_addr,
@@ -430,6 +430,7 @@ impl Stream for TcpListenStream {
                     })
                 }
                 Err(err) => {
+                    debug!("Error upgrading incoming connection from {}: {:?}", remote_addr, err);
                     self.pending.push_back(ListenerEvent::Upgrade {
                         upgrade: future::err(err),
                         listen_addr,