Fix empty first trace item when handling trigger_error

Author: vjik

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## 4.3.2 under development
 
-- Bug #160: Fix skipping the first trace item when handling a PHP error (@vjik)
+- Bug #160, #161: Fix skipping the first trace item when handling a PHP error (@vjik)
 
 ## 4.3.1 December 18, 2025
 

src/ErrorHandler.php

@@ -135,7 +135,12 @@ public function register(): void
             }
 
             $backtrace = debug_backtrace(0);
-            unset($backtrace[0]['function'], $backtrace[0]['class'], $backtrace[0]['type'], $backtrace[0]['args']);
+            if (isset($backtrace[0]['file'])) {
+                unset($backtrace[0]['function'], $backtrace[0]['class'], $backtrace[0]['type'], $backtrace[0]['args']);
+            } else {
+                array_shift($backtrace);
+            }
+
             throw new ErrorException($message, $severity, $severity, $file, $line, null, $backtrace);
         });
 

tests/ErrorHandlerTest.php

@@ -119,4 +119,28 @@ public function testHandleErrorWithCatching(): void
 
         $this->errorHandler->unregister();
     }
+
+    #[WithoutErrorHandler]
+    public function testHandleTriggerErrorWithCatching(): void
+    {
+        $this->errorHandler->register();
+        $array = ['type' => 'undefined'];
+
+        $exception = null;
+        try {
+            trigger_error('test-error');
+        } catch (Throwable $exception) {
+        }
+
+        $this->assertInstanceOf(ErrorException::class, $exception);
+        $this->assertFalse($exception::isFatalError($array));
+        $this->assertNull($exception->getSolution());
+
+        $backtrace = $exception->getBacktrace();
+        $this->assertNotEmpty($backtrace);
+        $this->assertArrayHasKey('file', $backtrace[0]);
+        $this->assertSame(__FILE__, $backtrace[0]['file']);
+
+        $this->errorHandler->unregister();
+    }
 }