Bug #79307 [Opn->Fbk]: httpd crash when combine strings in php

Edit report at https://bugs.php.net/bug.php?id=79307&edit=1 ID: 79307 Updated by: cmb@php.net Reported by: idzjy at live dot cn Summary: httpd crash when combine strings in php -Status: Open +Status: Feedback Type: Bug Package: Apache2 related Operating System: Windows 10 PHP Version: 7.3.15 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: Thank you for this bug report. To properly diagnose the problem, we need a backtrace to see what is happening behind the scenes. To find out how to generate a backtrace, please read http://bugs.php.net/bugs-generating-backtrace.php for *NIX and http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32 Once you have generated a backtrace, please submit it to this bug report and change the status back to "Open". Thank you for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2020-02-25 14:40:18] idzjy at live dot cn Description: ------------ when trying to combine thousands of strings using concatenation operator ('.'), httpd crash. like: https://github.com/laminas/laminas-validator/blob/master/src/Hostname/Biz.php https://github.com/laminas/laminas-validator/blob/master/src/Hostname/Cn.php the php package was downloaded directly from https://windows.php.net/downloads/releases/php-7.3.15-Win32-VC15-x64.zip apache version: 2.4.37 on windows with wampserver 3.1.7 64bit. crash on 7.2.14 / 7.3.9 / 7.3.15, not on 5.6.40 as I tested. crash on apache, not cli. // logs apache log: [Tue Feb 25 22:04:01.612217 2020] [mpm_winnt:notice] [pid 273704:tid 764] AH00428: Parent: child process 282396 exited with status 3221225725 -- Restarting. php logs nothing. Windows Event Viewer: - <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> - <System> <Provider Name="Application Error" /> <EventID Qualifiers="0">1000</EventID> <Level>2</Level> <Task>100</Task> <Keywords>0x80000000000000</Keywords> <TimeCreated SystemTime="2020-02-25T14:03:58.936699400Z" /> <EventRecordID>49477</EventRecordID> <Channel>Application</Channel> <Computer>***</Computer> <Security /> </System> - <EventData> <Data>httpd.exe</Data> <Data>2.4.37.0</Data> <Data>5bf538f3</Data> <Data>php7ts.dll</Data> <Data>7.3.15.0</Data> <Data>5e4bea74</Data> <Data>c00000fd</Data> <Data>0000000000011f92</Data> <Data>44f1c</Data> <Data>01d5ebe4613b26c1</Data> <Data>D:\wamp64\bin\apache\apache2.4.37\bin\httpd.exe</Data> <Data>D:\wamp64\bin\apache\apache2.4.37\bin\php7ts.dll</Data> <Data>caca7d2d-d7d9-4478-a028-6429e916ab68</Data> <Data /> <Data /> </EventData> </Event> Test script: --------------- <?php // test1.php $a = '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890'; // ... 2000 lines in total, crash var_dump($a); ////////////////////////////////////////////////// <?php // test2.php $a = '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890'; // ... 1000 lines in total, ok $b = '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890' . '123456789012345678901234567890'; // ... 1000 lines in total, ok $c = $a + $b; var_dump($c); // everything is fine ////////////////////////////////////////////////// // same thing happens even if reduce the length of the single string to '123'. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79307&edit=1