Check if output still is in outputs before doing anything with it

src/client.cpp

@@ -107,7 +107,7 @@ void waybar::Client::handleOutputDone(void* data, struct zxdg_output_v1* /*xdg_o
 }
 
 void waybar::Client::createBarsBatch() {
-  pending_outputs_.remove_if([this](auto* output) { return std::none_of(outputs_.begin(), outputs_.end(), [output](const auto& o) { return &o == output; }); });
+  pending_outputs_.remove_if([this](auto* output) { return std::none_of(outputs_.begin(), outputs_.end(), [&output](const auto& o) { return &o == output; }); });
   for (auto* output : pending_outputs_) {
     try {
       auto configs = getOutputConfigs(*output);