..

pub/lib/commands.cpp

@@ -375,7 +375,7 @@ bool frida_command(string cmd)
             if (fs::path(fname).extension().string()=="")
                 fname += ext;
             mode = SMem::instance()->overwrite ? "overwrite" : "create";
-        } else {
+        } else { // gfa
             fname = sask("Graphic file name", fname);
             mode = "append";
         }