Merge pull request #10430 from kinglozzer/backtrace

FIX: Invalid argument warning in backtrace

src/Dev/Backtrace.php

@@ -122,7 +122,7 @@ class Backtrace
                 }
             }
             if ($match) {
-                foreach ($bt[$i]['args'] as $j => $arg) {
+                foreach ($bt[$i]['args'] ?? [] as $j => $arg) {
                     $bt[$i]['args'][$j] = '<filtered>';
                 }
             }