ref: close handle only if active (#234)

* ref: close handle only if active

* ref: run lint

* ref: run lint

Author: JonasBa

bindings/cpu_profiler.cc

@@ -108,7 +108,13 @@ class MeasurementsTicker {
 
   ~MeasurementsTicker() {
     uv_timer_stop(&timer);
-    uv_close(reinterpret_cast<uv_handle_t *>(&timer), nullptr);
+
+    auto handle = reinterpret_cast<uv_handle_t *>(&timer);
+
+    // Calling uv_close on an inactive handle will cause a segfault.
+    if (uv_is_active(handle)) {
+      uv_close(handle, nullptr);
+    }
   }
 };