Fixed an issue where the PCRE JIT on PHP 7.3 caused PHPCS to die when using the parallel option (ref #2304)

Author: gsherwood

package.xml

@@ -27,6 +27,8 @@ http://pear.php.net/dtd/package-2.0.xsd">
  <license uri="https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt">BSD 3-Clause License</license>
  <notes>
   - Squiz.Arrays.ArrayDeclaration now has improved handling of syntax errors
+  - Fixed an issue where the PCRE JIT on PHP 7.3 caused PHPCS to die when using the parallel option
+    -- PHPCS now disables the PCRE JIT before running
   - Fixed bug #2368 : MySource.PHP.AjaxNullComparison throws error when first function has no doc comment 
   - Fixed bug #2414 : Indention false positive in switch/case/if combination
   - Fixed bug #2423 : Squiz.Formatting.OperatorBracket.MissingBrackets error with static

src/Runner.php

@@ -293,6 +293,9 @@ public function init()
         // be detected properly for files created on a Mac with the /r line ending.
         ini_set('auto_detect_line_endings', true);
 
+        // Disable the PCRE JIT as this caused issues with parallel running.
+        ini_set('pcre.jit', false);
+
         // Check that the standards are valid.
         foreach ($this->config->standards as $standard) {
             if (Util\Standards::isInstalledStandard($standard) === false) {
@@ -536,7 +539,10 @@ private function run()
                 }//end if
             }//end for
 
-            $this->processChildProcs($childProcs);
+            $success = $this->processChildProcs($childProcs);
+            if ($success === false) {
+                throw new RuntimeException('One or more child processes failed to run');
+            }
         }//end if
 
         restore_error_handler();
@@ -709,20 +715,35 @@ private function processChildProcs($childProcs)
         $numProcessed = 0;
         $totalBatches = count($childProcs);
 
+        $success = true;
+
         while (count($childProcs) > 0) {
             foreach ($childProcs as $key => $procData) {
                 $res = pcntl_waitpid($procData['pid'], $status, WNOHANG);
                 if ($res === $procData['pid']) {
                     if (file_exists($procData['out']) === true) {
                         include $procData['out'];
-                        if (isset($childOutput) === true) {
-                            $this->reporter->totalFiles    += $childOutput['totalFiles'];
-                            $this->reporter->totalErrors   += $childOutput['totalErrors'];
-                            $this->reporter->totalWarnings += $childOutput['totalWarnings'];
-                            $this->reporter->totalFixable  += $childOutput['totalFixable'];
-                            $this->reporter->totalFixed    += $childOutput['totalFixed'];
+
+                        unlink($procData['out']);
+                        unset($childProcs[$key]);
+
+                        $numProcessed++;
+
+                        if (isset($childOutput) === false) {
+                            // The child process died, so the run has failed.
+                            $file = new DummyFile(null, $this->ruleset, $this->config);
+                            $file->setErrorCounts(1, 0, 0, 0);
+                            $this->printProgress($file, $totalBatches, $numProcessed);
+                            $success = false;
+                            continue;
                         }
 
+                        $this->reporter->totalFiles    += $childOutput['totalFiles'];
+                        $this->reporter->totalErrors   += $childOutput['totalErrors'];
+                        $this->reporter->totalWarnings += $childOutput['totalWarnings'];
+                        $this->reporter->totalFixable  += $childOutput['totalFixable'];
+                        $this->reporter->totalFixed    += $childOutput['totalFixed'];
+
                         if (isset($debugOutput) === true) {
                             echo $debugOutput;
                         }
@@ -733,11 +754,6 @@ private function processChildProcs($childProcs)
                             }
                         }
 
-                        unlink($procData['out']);
-                        unset($childProcs[$key]);
-
-                        $numProcessed++;
-
                         // Fake a processed file so we can print progress output for the batch.
                         $file = new DummyFile(null, $this->ruleset, $this->config);
                         $file->setErrorCounts(
@@ -752,6 +768,8 @@ private function processChildProcs($childProcs)
             }//end foreach
         }//end while
 
+        return $success;
+
     }//end processChildProcs()