Bug #75969 [NEW]: Segmentation fault

From: alex at buayacorp dot com Operating system: Linux (debian) PHP version: 7.2.2 Package: opcache Bug Type: Bug Bug description:Segmentation fault Description: ------------ While preparing for a migration of our applications from PHP 7.0 to PHP 7.2, we noticed segmentation faults in our php-fpm processes. The test script below is a simplified example of what we are currently running in different debian based servers. I'm able to consistently reproduce it on a debian stretch vm too. alex@atoq-builder:~/src/php-7.2.2$ uname -a Linux atoq-builder 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u5 (2017-09-19) x86_64 GNU/Linux alex@atoq-builder:~/src/php-7.2.2$ sapi/cli/php -v PHP 7.2.2 (cli) (built: Feb 16 2018 15:01:07) ( NTS DEBUG ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies alex@atoq-builder:~/src/php-7.2.2$ sapi/cli/php -i | grep conf Configure Command => './configure' '--disable-all' '--enable-opcache' '--enable-debug' Test script: --------------- <?php // This is required for the segfault md5('foo'); class Extended_Class {}; $response = array( 'a' => 'b' ); new Extended_Class( array( 'foo' => $response, 'foo2' => 'bar2' ) ); new Extended_Class( array( 'foo' => $response, 'foo3' => $response, ) ); Expected result: ---------------- No segfault Actual result: -------------- with a PHP cli debug build alex@atoq-builder:~/src/php-7.2.2$ sapi/cli/php -dextension_dir=./modules/ -dzend_extension=opcache.so -dopcache.enable_cli=true segfault.php php: /home/alex/src/php-7.2.2/ext/opcache/Optimizer/dce.c:588: dce_live_ranges: Assertion `op_array->opcodes[def].result_type & ((1<<1)|(1<<2))' failed. Aborted It also fails on standard PHP-FPM and PHP cli (with opcache.enable_cli=true) builds. -- Edit bug report at https://bugs.php.net/bug.php?id=75969&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75969&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75969&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75969&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75969&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75969&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75969&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75969&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75969&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75969&r=support Expected behavior: https://bugs.php.net/fix.php?id=75969&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75969&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75969&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75969&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75969&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75969&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75969&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75969&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75969&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75969&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75969&r=mysqlcfg