Bug #80140 [Dup]: Including a file multiple times with anonymous class is leaking memory

Edit report at https://bugs.php.net/bug.php?id=80140&edit=1 ID: 80140 Updated by: nikic@php.net Reported by: mvorisek at mvorisek dot cz Summary: Including a file multiple times with anonymous class is leaking memory Status: Duplicate Type: Bug Package: Scripting Engine problem Operating System: any PHP Version: 7.4.10 Block user comment: N Private report: N New Comment: Duplicate of bug #76982. Also last comment on bug #79519. Previous Comments: ------------------------------------------------------------------------ [2020-09-22 21:24:17] mvorisek at mvorisek dot cz Even function declaration included multiple times is leaking memory: ``` return; function xxx() {} ``` https://3v4l.org/NOejV ------------------------------------------------------------------------ [2020-09-22 21:07:34] mvorisek at mvorisek dot cz Description: ------------ see https://3v4l.org/nUFqX including file multiple times is very common usecase and memory should not increase the issue is present when the included file contains an anonymous class, but the class should be not recreated again and again Test script: --------------- if (isset($fromRequire)) { // return; // leaking even if code below is never executed $class = new class() extends \stdClass {}; return; } for ($i = 0; $i < 10 * 1000; $i++) { $fromRequire = true; require __FILE__; if (($i % (1000)) === 0) { gc_collect_cycles(); echo round(memory_get_usage() / (1024 * 1024), 3) . " MiB\n"; } } Expected result: ---------------- reported memory usage should stay below 1 MiB Actual result: -------------- 0.37 MiB 1.152 MiB 1.973 MiB 2.872 MiB 3.614 MiB 4.67 MiB 5.412 MiB 6.155 MiB 6.898 MiB 8.265 MiB ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80140&edit=1