diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_location-changes-02-blank.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_location-changes-02-blank.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Make sure that changing the tab location URL to a page with no sources works.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_recursion-stack.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gEditor, gSources, gFrames;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+    gFrames = gDebugger.DebuggerView.StackFrames;
+
+    waitForSourceAndCaretAndScopes(gPanel, ".html", 14).then(testLocationChange);
+    gDebuggee.simpleCall();
+  });
+}
+
+function testLocationChange() {
+  navigateActiveTabTo(gPanel, "about:blank", gDebugger.EVENTS.SOURCES_ADDED).then(() => {
+    isnot(gDebugger.gThreadClient.state, "paused",
+      "Should not be paused after a tab navigation.");
+
+    is(gFrames.itemCount, 0,
+      "Should have no frames.");
+
+    is(gSources.itemCount, 0,
+      "Found no entries in the sources widget.");
+
+    is(gSources.selectedValue, "",
+      "There should be no selected source value.");
+    is(gEditor.getText().length, 0,
+      "The source editor should not have any text displayed.");
+
+    is(gDebugger.document.querySelectorAll("#sources .side-menu-widget-empty-text").length, 1,
+      "The sources widget should now display a notice (1).");
+    is(gDebugger.document.querySelectorAll("#sources .side-menu-widget-empty-text")[0].getAttribute("value"),
+       gDebugger.L10N.getStr("noSourcesText"),
+      "The sources widget should now display a notice (2).");
+
+    closeDebuggerAndFinish(gPanel);
+  });
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+  gFrames = null;
+});