webContents: check for navigation entry before using

diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index 0400e94..d6e0b17 100644 (file)
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -258,7 +258,9 @@ void WebContents::DidNavigateMainFrame(
 
 void WebContents::TitleWasSet(content::NavigationEntry* entry,
                               bool explicit_set) {
-  Emit("page-title-set", entry->GetTitle(), explicit_set);
+  // Back/Forward navigation may have pruned entries.
+  if (entry)
+    Emit("page-title-set", entry->GetTitle(), explicit_set);
 }
 
 void WebContents::DidUpdateFaviconURL(