From e3b0b9a0c740acb9722798eae393e1251499aa0c Mon Sep 17 00:00:00 2001
From: Aaron Piotrowski <aaron@trowski.com>
Date: Sat, 2 Dec 2017 10:03:38 -0600
Subject: [PATCH] Update backtrace formatting

---
 lib/Internal/functions.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/Internal/functions.php b/lib/Internal/functions.php
index 8bf566c..1491274 100644
--- a/lib/Internal/functions.php
+++ b/lib/Internal/functions.php
@@ -14,7 +14,11 @@ namespace Amp\Internal;
  */
 function formatStacktrace(array $trace): string {
     return \implode("\n", \array_map(function ($e, $i) {
-        $line = "#{$i} {$e['file']}:{$e['line']} ";
+        $line = "#{$i} ";
+
+        if (isset($e["file"])) {
+            $line .= "{$e['file']}:{$e['line']} ";
+        }
 
         if ($e["type"]) {
             $line .= $e["class"] . $e["type"];