[BUGFIX] Skip array_merge if recipients is not an array (#298)

Resolves: #263

Author: simonschaufi

.editorconfig

@@ -13,7 +13,7 @@ insert_final_newline = true
 indent_style = tab
 
 # YAML-Files
-[{*.yml,*.yaml}]
+[{*.yml,*.yaml,*.yml.fixture,*.yaml.fixture}]
 indent_size = 2
 
 # XML-Files

packages/typo3-fractor/rules-tests/TYPO3v10/Yaml/EmailFinisherYamlFractor/Fixtures/bug_263.form.yaml.fixture

@@ -0,0 +1,17 @@
+finishers:
+  -
+    options:
+      recipients:
+        '':''
+      senderAddress: ''
+      senderName: SENDERNAME
+    identifier: EmailToReceiver
+-----
+finishers:
+  -
+    options:
+      recipients:
+        '':''
+      senderAddress: ''
+      senderName: SENDERNAME
+    identifier: EmailToReceiver

packages/typo3-fractor/rules/TYPO3v10/Yaml/EmailFinisherYamlFractor.php

@@ -134,6 +134,9 @@ private function refactorFinishers(array $finishers, array &$yamlToModify): void
             }
 
             if (isset($finisher[self::OPTIONS][self::RECIPIENTS])) {
+                if (! is_array($yamlToModify[self::FINISHERS][$finisherKey][self::OPTIONS][self::RECIPIENTS])) {
+                    continue;
+                }
                 $yamlToModify[self::FINISHERS][$finisherKey][self::OPTIONS][self::RECIPIENTS] = array_merge(
                     $recipients,
                     $yamlToModify[self::FINISHERS][$finisherKey][self::OPTIONS][self::RECIPIENTS]