1 files changed, 7 insertions, 0 deletions
diff --git a/docshell/shistory/nsSHEntry.cpp b/docshell/shistory/nsSHEntry.cpp
index 9d972136f..9d8bf5096 100644
--- a/docshell/shistory/nsSHEntry.cpp
+++ b/docshell/shistory/nsSHEntry.cpp
@@ -416,6 +416,9 @@ nsSHEntry::Create(nsIURI* aURI, const nsAString& aTitle,
                   uint64_t aDocShellID,
                   bool aDynamicCreation)
 {
+  MOZ_ASSERT(aTriggeringPrincipal,
+             "need a valid triggeringPrincipal to create a session history entry");
+
   mURI = aURI;
   mTitle = aTitle;
   mPostData = aInputStream;
@@ -515,6 +518,10 @@ nsSHEntry::GetTriggeringPrincipal(nsIPrincipal** aTriggeringPrincipal)
 NS_IMETHODIMP
 nsSHEntry::SetTriggeringPrincipal(nsIPrincipal* aTriggeringPrincipal)
 {
+  MOZ_ASSERT(aTriggeringPrincipal, "need a valid triggeringPrincipal");
+  if (!aTriggeringPrincipal) {
+    return NS_ERROR_FAILURE;
+  }
   mShared->mTriggeringPrincipal = aTriggeringPrincipal;
   return NS_OK;
 }