--- a/gfx/gl/GLLibraryEGL.cpp
+++ b/gfx/gl/GLLibraryEGL.cpp
@@ -184,16 +184,20 @@ public:
 
     void SetFailureId(nsACString* const aFailureId)
     {
       mFailureId = aFailureId;
     }
 
     void logError(const char *errorMessage) override
     {
+        if (!mFailureId) {
+            return;
+        }
+
         nsCString str(errorMessage);
         Tokenizer tokenizer(str);
 
         // Parse "ANGLE Display::initialize error " << error.getID() << ": "
         //       << error.getMessage()
         nsCString currWord;
         Tokenizer::Token intToken;
         if (tokenizer.CheckWord("ANGLE") &&