add stack trace to bootstrap error message

Author: ShaneOH

src/TextUI/Command.php

@@ -567,10 +567,12 @@ protected function handleBootstrap(string $filename): void
 
             $this->exitWithErrorMessage(
                 sprintf(
-                    'Error in bootstrap script: %s:%s%s',
+                    'Error in bootstrap script: %s:%s%s%s%s',
                     get_class($t),
                     PHP_EOL,
-                    $t->getMessage()
+                    $t->getMessage(),
+                    PHP_EOL,
+                    $t->getTraceAsString()
                 )
             );
         }

tests/end-to-end/regression/GitHub/4620.phpt

@@ -1,5 +1,5 @@
 --TEST--
-https://github.com/sebastianbergmann/phpunit/issues/4620
+GH-4620 GH-4877
 --FILE--
 <?php declare(strict_types=1);
 
@@ -17,3 +17,4 @@ PHPUnit %s #StandWithUkraine
 
 Error in bootstrap script: PHPUnit\TestFixture\MyException:
 Big boom. Big bada boom.
+%a