0002091: Output buffering goes into infinite loop if output exceeds a certain size

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Category

Severity

Reproducibility

Date Submitted

Last Update

0002091

[Quercus]

major

always

10-18-07 23:56

10-19-07 13:53

Reporter

koreth

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Status

closed

Product Version

3.1.3

Summary

0002091: Output buffering goes into infinite loop if output exceeds a certain size

Description

<?php
function stash_it($text) {
  global $output;
  $output = $text;
}
ob_start('stash_it');
for ($i = 0; $i < 10000; $i++) {
  print " - $i";
}
ob_end_flush();
print $output;

Vanilla PHP prints the numbers 0 to 9999. Quercus gets caught in an infinite loop calling ob_end_flush -- it looks like a link list entry manages to point to itself as the next item. (OutputBuffer.getContents()).

If you reduce the maximum number to, say, 1000, this works fine under Quercus.

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Notes
(0002370) koreth 10-19-07 10:21	Adding "return null;" to the end of the callback function clears this problem up, so this may be a difference in default return value semantics in Quercus vs. PHP rather than an output buffering issue per se (but the test case as posted does act differently in the two environments and does make Quercus go into an infinite loop.)

(0002371) ferg 10-19-07 13:53	php/1l1-

Issue History
Date Modified	Username	Field	Change
10-18-07 23:56	koreth	New Issue
10-19-07 10:21	koreth	Note Added: 0002370
10-19-07 13:53	ferg	Note Added: 0002371
10-19-07 13:53	ferg	Assigned To	=> ferg
10-19-07 13:53	ferg	Status	new => closed
10-19-07 13:53	ferg	Resolution	open => fixed
10-19-07 13:53	ferg	Fixed in Version	=> 3.1.4

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