Bug #80917 [NEW]: LimitIterator does not end at count

From: Date: Mon, 29 Mar 2021 20:08:53 +0000
Subject: Bug #80917 [NEW]: LimitIterator does not end at count
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-233053@lists.php.net to get a copy of this message 
From:             alexandreparent_dev at outlook dot com
Operating system: All
PHP version:      Irrelevant
Package:          SPL related
Bug Type:         Bug
Bug description:LimitIterator does not end at count

Description:
------------
LimitIterator will try to iterate beyond $count. If its inner iterator
never yield another item nor return, the LimitIterator will not limit at
the expected count.

Test script:
---------------
<?php

function generator(): iterable {
  $count = 0;
  while (true) {
    yield $count++;
    echo 'Yielded: ', $count - 1, \PHP_EOL;

    if ($count > 2) {
      while(true);
    }
  }
}

foreach (new \LimitIterator($generator(), 0, 3) as $count) {
  echo 'Iterating: ', $count, \PHP_EOL;
}

Expected result:
----------------
Iterating: 0
Yielded: 0
Iterating: 1
Yielded: 1
Iterating: 2
Yielded: 2

// Hanging here


Actual result:
--------------
Iterating: 0
Yielded: 0
Iterating: 1
Yielded: 1
Iterating: 2

// Exiting here

-- 
Edit bug report at https://bugs.php.net/bug.php?id=80917&edit=1
-- 
Fix committed:                    https://bugs.php.net/fix.php?id=80917&r=fixed
Fixed in release:                 https://bugs.php.net/fix.php?id=80917&r=alreadyfixed
Need backtrace:                   https://bugs.php.net/fix.php?id=80917&r=needtrace
Need Reproduce Script:            https://bugs.php.net/fix.php?id=80917&r=needscript
Try newer version:                https://bugs.php.net/fix.php?id=80917&r=oldversion
Not developer issue:              https://bugs.php.net/fix.php?id=80917&r=support
Expected behavior:                https://bugs.php.net/fix.php?id=80917&r=notwrong
Not enough info:                  https://bugs.php.net/fix.php?id=80917&r=notenoughinfo
Submitted twice:                  https://bugs.php.net/fix.php?id=80917&r=submittedtwice
register_globals:                 https://bugs.php.net/fix.php?id=80917&r=globals
PHP version support discontinued: https://bugs.php.net/fix.php?id=80917&r=phptooold
Daylight Savings:                 https://bugs.php.net/fix.php?id=80917&r=dst
IIS Stability:                    https://bugs.php.net/fix.php?id=80917&r=isapi
Install GNU Sed:                  https://bugs.php.net/fix.php?id=80917&r=gnused
Floating point limitations:       https://bugs.php.net/fix.php?id=80917&r=float
No Zend Extensions:               https://bugs.php.net/fix.php?id=80917&r=nozend
MySQL Configuration Error:        https://bugs.php.net/fix.php?id=80917&r=mysqlcfg

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