Own and cancel desktop bridge commands before core teardown

tools/chatgui/src/connmonitorwindow.cpp

@@ -6,6 +6,7 @@
 extern "C" {
 #include "chat/chat_core.h"
 #include "../../lib/mem.h"
+#include "../../../lib/debug_config.h"
 }
 
 #include <QVBoxLayout>
@@ -104,6 +105,7 @@ void ConnMonitorWindow::hideEvent(QHideEvent* event) {
 void ConnMonitorWindow::onTimerTick() {
     if (m_details->textCursor().hasSelection()) return;
     if (QApplication::mouseButtons()) return;
+    if (!gui_bridge_is_uasync_ready() || !gui_bridge_get_inst()) return;
     gui_bridge_post_uasync_fn(chat_core_collect_conn_list_trampoline, gui_bridge_get_inst());
     if (m_selectedNodeId) requestMetricsForSelected();
 }
@@ -116,11 +118,13 @@ void ConnMonitorWindow::onConnSelected(QListWidgetItem* current, QListWidgetItem
 }
 
 void ConnMonitorWindow::requestMetricsForSelected() {
+    auto* inst = gui_bridge_get_inst();
+    if (!inst || !m_selectedNodeId || !gui_bridge_is_uasync_ready()) return;
     struct chat_node_arg* arg = (struct chat_node_arg*)u_malloc(sizeof(struct chat_node_arg));
-    if (!arg) return;
-    arg->inst = gui_bridge_get_inst();
+    if (!arg) { DEBUG_ERROR(DEBUG_CATEGORY_GENERAL, "connection monitor: metrics request allocation failed"); return; }
+    arg->inst = inst;
     arg->node_id = m_selectedNodeId;
-    gui_bridge_post_uasync_fn(chat_core_collect_conn_metrics_trampoline, arg);
+    if (gui_bridge_post_uasync_owned_fn(chat_core_collect_conn_metrics_trampoline, arg) < 0) u_free(arg);
 }
 
 void ConnMonitorWindow::onConnList(const uint8_t* data, int len) {