Laravel Lumen performance traces not collected because route never matched

phpstan-baseline.neon

@@ -160,6 +160,11 @@ parameters:
 			count: 1
 			path: src/Sentry/Laravel/Tracing/Integrations/LighthouseIntegration.php
 
+		-
+			message: "#^Class Laravel\\\\Lumen\\\\Application not found\\.$#"
+			count: 1
+			path: src/Sentry/Laravel/Tracing/Middleware.php
+
 		-
 			message: "#^Class Laravel\\\\Lumen\\\\Application not found\\.$#"
 			count: 2

src/Sentry/Laravel/Tracing/Middleware.php

@@ -112,8 +112,7 @@ public function terminate(Request $request, $response): void
             return;
         }
 
-        // We stop here if a route has not been matched unless we are configured to trace missing routes
-        if (!$this->didRouteMatch && config('sentry.tracing.missing_routes', false) === false) {
+        if ($this->shouldRouteBeIgnored($request)) {
             return;
         }
 
@@ -279,6 +278,21 @@ private function internalSignalRouteWasMatched(): void
         $this->didRouteMatch = true;
     }
 
+    /**
+     * Indicates if the route should be ignored and the transaction discarded.
+     */
+    private function shouldRouteBeIgnored(Request $request): bool
+    {
+        // Laravel Lumen doesn't use `illuminate/routing`.
+        // Instead we use the route available on the request to detect if a route was matched.
+        if ($this->app instanceof LumenApplication) {
+            return $request->route() === null && config('sentry.tracing.missing_routes', false) === false;
+        }
+
+        // If a route has not been matched we ignore unless we are configured to trace missing routes
+        return !$this->didRouteMatch && config('sentry.tracing.missing_routes', false) === false;
+    }
+
     public static function signalRouteWasMatched(): void
     {
         if (!app()->bound(self::class)) {