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Source/devtools/front_end/sdk/DebuggerModel.js

Index: Source/devtools/front_end/sdk/DebuggerModel.js
diff --git a/Source/devtools/front_end/sdk/DebuggerModel.js b/Source/devtools/front_end/sdk/DebuggerModel.js
index 9e18b1813515fff702b90322aabb23567c536800..bb2b0325e471e0da7d6611053265db7ed6dad13f 100644
--- a/Source/devtools/front_end/sdk/DebuggerModel.js
+++ b/Source/devtools/front_end/sdk/DebuggerModel.js
@@ -125,12 +125,21 @@ WebInspector.DebuggerModel.prototype = {
     {
         if (this._debuggerEnabled)
             return;
-        this._agent.enable();
-        this._debuggerEnabled = true;
+        this._agent.enable(this._wasEnabled.bind(this));
         if (this._hasStaleState) {
             this._globalObjectCleared();
             this._hasStaleState = false;
         }
+    },
+
+    /**
+     * @param {?Protocol.Error} error
+     */
+    _wasEnabled: function(error)
+    {
+        if (error)
+            console.error(error);
+        this._debuggerEnabled = true;
         this._pauseOnExceptionStateChanged();
         this.asyncStackTracesStateChanged();
         this.dispatchEventToListeners(WebInspector.DebuggerModel.Events.DebuggerWasEnabled);