Bug 1582589 - Client cert checking fails when CAs differ on server and client certs r=davidwalsh

Differential Revision: https://phabricator.services.mozilla.com/D50913

--HG--
extra : moz-landing-system : lando

devtools/server/actors/network-monitor/network-response-listener.js

@@ -330,9 +330,14 @@ NetworkResponseListener.prototype = {
     const info = NetworkHelper.parseSecurityInfo(secinfo, this.httpActivity);
 
     let isRacing = false;
-    const channel = this.httpActivity.channel;
-    if (channel instanceof Ci.nsICacheInfoChannel) {
-      isRacing = channel.isRacing();
+    try {
+      const channel = this.httpActivity.channel;
+      if (channel instanceof Ci.nsICacheInfoChannel) {
+        isRacing = channel.isRacing();
+      }
+    } catch (err) {
+      // See the following bug for more details:
+      // https://bugzilla.mozilla.org/show_bug.cgi?id=1582589
     }
 
     this.httpActivity.owner.addSecurityInfo(info, isRacing);