Bug #77638 [NEW]: var_export on an FFI\CData:* instance causes a segmentation fault

From: tandre Operating system: Linux PHP version: Next Minor Version Package: Reproducible crash Bug Type: Bug Bug description:var_export on an FFI\CData:* instance causes a segmentation fault Description: ------------ Whenever var_export() is called on the result of FFI::new(), PHP segfaults. I think it's related to calling GC_PROTECT_RECURSION, *but the line numbers in my build may be wrong* ``` 553 GC_PROTECT_RECURSION(myht); (gdb) bt #0 0x0000000000944811 in php_var_export_ex (struc=0x7fffecc13100, level=1, buf=0x7fffffffbf90) at /path/to/php-src/ext/standard/var.c:553 #1 0x0000000000944fe3 in zif_var_export (execute_data=0x7fffecc130b0, return_value=0x7fffffffbfe0) at /path/to/php-src/ext/standard/var.c:622 #2 0x0000000000bb2b63 in ZEND_DO_ICALL_SPEC_RETVAL_UNUSED_HANDLER () at /path/to/php-src/Zend/zend_vm_execute.h:649 ``` Test script: --------------- ``` » php -a Interactive shell php > $x = FFI::new('int'); php > echo gettype($x); object php > echo get_class($x); FFI\CData php > var_dump($x); object(FFI\CData:int32_t)#1 (1) { ["cdata"]=> int(0) } php > var_export($x); [1] 2615 segmentation fault php -a ``` Expected result: ---------------- Either dumps the type or throws an Exception/Error for being impossible to dump Actual result: -------------- Segfaults -- Edit bug report at https://bugs.php.net/bug.php?id=77638&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77638&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77638&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77638&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77638&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77638&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77638&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77638&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77638&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77638&r=support Expected behavior: https://bugs.php.net/fix.php?id=77638&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77638&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77638&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77638&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77638&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77638&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77638&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77638&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77638&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77638&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77638&r=mysqlcfg