fix exception handling

Author: c9s

src/ExceptionPrinter/DevelopmentExceptionPrinter.php

@@ -95,7 +95,11 @@ public function dumpTrace(Exception $e)
             $argDesc = $this->dumpArgs($entry['args']);
 
             $this->logger->info(sprintf("    %d) %s%s%s(%s)", $idx, @$entry['class'], @$entry['type'], $entry['function'], $argDesc));
-            $this->logger->info(sprintf("        from %s: %d", $entry['file'], $entry['line']));
+
+            if (isset($entry['file'])) {
+                $this->logger->info(sprintf("        from %s: %d", @$entry['file'], @$entry['line']));
+            }
+
             $this->logger->newline();
         }
         $this->logger->newline();