PHPT: Trigger runner warning on parse-error in CLEAN

Author: staabm

src/Runner/Phpt/TestCase.php

@@ -432,19 +432,21 @@ private function runClean(array $sections, bool $collectCoverage): void
         $cleanCode = (new Renderer)->render($this->filename, $sections['CLEAN']);
 
         if ($this->shouldRunInSubprocess($sections, $cleanCode)) {
-            $result = JobRunnerRegistry::run(
+            $jobResult = JobRunnerRegistry::run(
                 new Job(
                     $cleanCode,
                     $this->settings($collectCoverage),
                 ),
             );
 
-            EventFacade::emitter()->childProcessFinished($result->stdout(), $result->stderr());
+            $output = $jobResult->stdout();
 
-            return;
+            EventFacade::emitter()->childProcessFinished($jobResult->stdout(), $jobResult->stderr());
+        } else {
+            $output = $this->runCodeInLocalSandbox($cleanCode);
         }
 
-        $this->runCodeInLocalSandbox($cleanCode);
+        $this->triggerWarningOnPhpErrors('CLEAN', $output);
     }
 
     /**

tests/end-to-end/_files/phpt-clean-parse-error.phpt

@@ -0,0 +1,11 @@
+--TEST--
+https://github.com/sebastianbergmann/phpunit/issues/5991
+--CLEAN--
+<?php
+if (rand(0,1)) // intentional PHP Parse error (missing opening curly brace)
+}
+--FILE--
+<?php declare(strict_types=1);
+echo 'hello world';
+--EXPECTF--
+hello world

tests/end-to-end/phpt/phpt-clean-parse-error.phpt

@@ -0,0 +1,28 @@
+--TEST--
+https://github.com/sebastianbergmann/phpunit/issues/5991
+--FILE--
+<?php declare(strict_types=1);
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = __DIR__ . '/../_files/phpt-clean-parse-error.phpt';
+
+require_once __DIR__ . '/../../bootstrap.php';
+
+(new PHPUnit\TextUI\Application)->run($_SERVER['argv']);
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+Runtime: %s
+
+.                                                                   1 / 1 (100%)
+
+Time: %s, Memory: %s
+
+There was 1 PHPUnit test runner warning:
+
+1) CLEAN section triggered a parse error: 
+Parse error: Unmatched '}' in Standard input code on line 3
+
+
+OK, but there were issues!
+Tests: 1, Assertions: 1, PHPUnit Warnings: 1.