Closes #4913

Author: sebastianbergmann

ChangeLog-8.5.md

@@ -2,6 +2,12 @@
 
 All notable changes of the PHPUnit 8.5 release series are documented in this file using the [Keep a CHANGELOG](https://keepachangelog.com/) principles.
 
+## [8.5.30] - 2022-MM-DD
+
+### Fixed
+
+* [#4913](https://github.com/sebastianbergmann/phpunit/issues/4913): Failed `assert()` should show a backtrace
+
 ## [8.5.29] - 2022-08-22
 
 ### Changed
@@ -239,6 +245,7 @@ All notable changes of the PHPUnit 8.5 release series are documented in this fil
 * [#3967](https://github.com/sebastianbergmann/phpunit/issues/3967): Cannot double interface that extends interface that extends `\Throwable`
 * [#3968](https://github.com/sebastianbergmann/phpunit/pull/3968): Test class run in a separate PHP process are passing when `exit` called inside
 
+[8.5.30]: https://github.com/sebastianbergmann/phpunit/compare/8.5.29...8.5
 [8.5.29]: https://github.com/sebastianbergmann/phpunit/compare/8.5.28...8.5.29
 [8.5.28]: https://github.com/sebastianbergmann/phpunit/compare/8.5.27...8.5.28
 [8.5.27]: https://github.com/sebastianbergmann/phpunit/compare/8.5.26...8.5.27

src/Framework/TestResult.php

@@ -740,7 +740,9 @@ function_exists('xdebug_start_function_monitor');
                     $e->getMessage(),
                     $frame['file'] ?? $e->getFile(),
                     $frame['line'] ?? $e->getLine()
-                )
+                ),
+                0,
+                $e
             );
         } catch (Warning $e) {
             $warning = true;

src/TextUI/ResultPrinter.php

@@ -23,6 +23,7 @@
 use function str_pad;
 use function str_repeat;
 use function strlen;
+use function trim;
 use function vsprintf;
 use PHPUnit\Framework\AssertionFailedError;
 use PHPUnit\Framework\Exception;
@@ -367,7 +368,7 @@ protected function printDefectTrace(TestFailure $defect): void
         $this->write((string) $e);
 
         while ($e = $e->getPrevious()) {
-            $this->write("\nCaused by\n" . $e);
+            $this->write("\nCaused by\n" . trim((string) $e) . "\n");
         }
     }
 

tests/end-to-end/generic/assertion.phpt

@@ -29,5 +29,10 @@ There was 1 failure:
 1) PHPUnit\TestFixture\AssertionExampleTest::testOne
 assert(false) in %sAssertionExample.php:%d
 
+Caused by
+AssertionError: assert(false) in %sAssertionExample.php:%d
+Stack trace:
+%A
+
 FAILURES!
 Tests: 1, Assertions: 1, Failures: 1.