From 3dd522b6b78fe32c44af571098d0ff4d1dcc9398 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Thu, 28 Jul 2011 15:57:59 -0700
Subject: [PATCH] Add an assertion about the lock in rust_chan::disassociate

---
 src/rt/rust_chan.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/rt/rust_chan.cpp b/src/rt/rust_chan.cpp
index e32c4214afc6..9017e9a2bc18 100644
--- a/src/rt/rust_chan.cpp
+++ b/src/rt/rust_chan.cpp
@@ -51,7 +51,9 @@ bool rust_chan::is_associated() {
  * Unlink this channel from its associated port.
  */
 void rust_chan::disassociate() {
-    // Precondition: port->referent()->lock must be held
+    A(kernel,
+      port->referent()->lock.lock_held_by_current_thread(),
+      "Port referent lock must be held to call rust_chan::disassociate");
     A(kernel, is_associated(),
       "Channel must be associated with a port.");
     if (port->is_proxy() == false) {