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Subject: Memory leak with .=
From: thekid@thekid.de (Timm Friebe)

The following script:

<?php
  class StringBuffer {
    public $buf= '';

    public function append($string) {
      $this->buf.= ($string instanceof StringBuffer
        ? $string->buf
        : $string
      );
    }
  }
  
  $s= new StringBuffer();
  $s->append('Hello');
?>

causes:

/usr/home/thekid/devel/php/php/Zend/zend_execute.c(4049) :  Freeing
0x083B0310 (6 bytes), script=string.php
/usr/home/thekid/devel/php/php/Zend/zend_variables.c(137) : Actual
location (location was relayed)
=== Total 1 memory leaks detected ===

Changing the line $this->buf.= [...] to $this->buf= $this->buf. makes
the leak disappear.

- Timm