1--TEST--
2Bug #39445 (Calling debug_backtrace() in the __toString() function produces a crash)
3--FILE--
4<?php
5class test {
6 public function __toString() {
7 debug_backtrace();
8 return 'lowercase';
9 }
10}
11
12 $test = new test();
13 echo strtoupper($test);
14?>
15--EXPECT--
16LOWERCASE
17
