Generic/ConstructorName: more defensive coding / prevent fatal error

src/Standards/Generic/Sniffs/NamingConventions/ConstructorNameSniff.php

@@ -78,8 +78,13 @@ protected function processTokenWithinScope(File $phpcsFile, $stackPtr, $currScop
             $this->currentClass = $className;
         }
 
-        $methodName = strtolower($phpcsFile->getDeclarationName($stackPtr));
+        $methodName = $phpcsFile->getDeclarationName($stackPtr);
+        if ($methodName === null) {
+            // Live coding or parse error. Bow out.
+            return;
+        }
 
+        $methodName = strtolower($methodName);
         if ($methodName === $className) {
             if (in_array('__construct', $this->functionList, true) === false) {
                 $error = 'PHP4 style constructors are not allowed; use "__construct()" instead';
@@ -164,7 +169,13 @@ protected function loadFunctionNamesInScope(File $phpcsFile, $currScope)
                 continue;
             }
 
-            $this->functionList[] = trim(strtolower($phpcsFile->getDeclarationName($i)));
+            $methodName = $phpcsFile->getDeclarationName($i);
+            if ($methodName === null) {
+                // Live coding or parse error. Ignore.
+                continue;
+            }
+
+            $this->functionList[] = trim(strtolower($methodName));
 
             if (isset($tokens[$i]['scope_closer']) !== false) {
                 // Skip past nested functions and such.

src/Standards/Generic/Tests/NamingConventions/ConstructorNameUnitTest.2.inc

@@ -0,0 +1,9 @@
+<?php
+
+// Intentional parse error (missing method name).
+// This should be the only test in this file.
+// Testing that the sniff is *not* triggered.
+
+class My_Class {
+    public function {}
+}

src/Standards/Generic/Tests/NamingConventions/ConstructorNameUnitTest.php

@@ -26,24 +26,31 @@ final class ConstructorNameUnitTest extends AbstractSniffUnitTest
      * The key of the array should represent the line number and the value
      * should represent the number of errors that should occur on that line.
      *
+     * @param string $testFile The name of the test file to process.
+     *
      * @return array<int, int>
      */
-    public function getErrorList()
+    public function getErrorList($testFile='')
     {
-        return [
-            6   => 1,
-            11  => 1,
-            47  => 1,
-            62  => 1,
-            91  => 1,
-            103 => 1,
-            104 => 1,
-            112 => 1,
-            120 => 1,
-            121 => 1,
-            126 => 1,
-            127 => 1,
-        ];
+        switch ($testFile) {
+        case 'ConstructorNameUnitTest.1.inc':
+            return [
+                6   => 1,
+                11  => 1,
+                47  => 1,
+                62  => 1,
+                91  => 1,
+                103 => 1,
+                104 => 1,
+                112 => 1,
+                120 => 1,
+                121 => 1,
+                126 => 1,
+                127 => 1,
+            ];
+        default:
+            return [];
+        }//end switch
 
     }//end getErrorList()