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symfony · Mar 23, 2019 · cf62089 · cf62089
1 parent c625996
commit cf62089
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/Symfony/Component/Console/Tester/CommandTester.php b/src/Symfony/Component/Console/Tester/CommandTester.php
@@ -87,6 +87,10 @@ public function execute(array $input, array $options = [])
      */
     public function getDisplay($normalize = false)
     {
+        if (null === $this->output) {
+            throw new \RuntimeException('Output not initialized, did you execute the command before requesting the display?');
+        }
+
         rewind($this->output->getStream());
 
         $display = stream_get_contents($this->output->getStream());