bug symfony#54854 [Stopwatch] undefined key error when trying to fetch a missing section

Author: Alex Niedre

src/Symfony/Component/Stopwatch/Stopwatch.php

@@ -140,7 +140,7 @@ public function getEvent(string $name): StopwatchEvent
      */
     public function getSectionEvents(string $id): array
     {
-        return $this->sections[$id]->getEvents() ?? [];
+        return isset($this->sections[$id]) ? $this->sections[$id]->getEvents() : [];
     }
 
     /**

src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php

@@ -187,4 +187,9 @@ public function testReset()
 
         $this->assertEquals(new Stopwatch(), $stopwatch);
     }
+
+    public function testShouldReturnEmptyArrayWhenSectionMissing()
+    {
+        $this->assertSame([], (new Stopwatch())->getSectionEvents('missing'));
+    }
 }