ID: 41633 Updated by: [EMAIL PROTECTED] Reported By: m dot stach at ewerk dot com -Status: Open +Status: Closed Bug Type: Reproducible crash Operating System: Windows/MacOSX PHP Version: 5.2.3 -Assigned To: +Assigned To: dmitry New Comment:
This bug has been fixed in CVS. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2007-06-11 08:50:57] m dot stach at ewerk dot com Interestingly the following code gives an (however misleading) fatal error: class b { const FOO = self::FOO; } $a = b::FOO; Fatal error: Cannot access self:: when no class scope is active in ... I wonder why constants are processed at runtime not parse/compile time. But that's not a bug but an architectural issue. BTW: I would never expect the interpreter to crash. ------------------------------------------------------------------------ [2007-06-09 00:17:56] [EMAIL PROTECTED] Just checking same constant wouldn't help since you could have: const self::FOO = self::BAR; const self::BAR = self::FOO; but we can try and look into how to detect looping and either limit the depth or just break the loop one way or another. ------------------------------------------------------------------------ [2007-06-08 22:00:48] judas dot iscariote at gmail dot com This is the expected behaviuor, as your code produced infinite recursion FOO = self::FOO -> FOO = self::FOO -> FOO = self::FOO and the interpreter ends crashing ( as expected) However I suspect in this particular case, something can be done to avoid this, maybe zval_update_constant_ex() can check if we ar trying to assign a constant to the same constant and emit a nice fatal error, not sure..though. ------------------------------------------------------------------------ [2007-06-08 13:38:29] m dot stach at ewerk dot com Sorry, the expected result I specified was wrong. Expected Result --------------- I would expect error message (parse, compile or runtime/fatal error). ------------------------------------------------------------------------ [2007-06-08 13:35:19] m dot stach at ewerk dot com Description: ------------ When instantiating classes with self-referencing constants PHP crashes. It is reproducable on Windows (5.2.3), Mac (5.2.2) and Linux (5.2.0). Reproduce code: --------------- class b { const FOO = self::FOO; } new b(); echo "1"; Expected result: ---------------- 1 Actual result: -------------- No output, segmentation fault instead. Since I don't have MSVC available for backtrace, I tried on a mac and linux box, same result (but Versions were 5.2.2 and 5.2.0). Looks like an endless recursion. Crash-Report: Date/Time: 2007-06-08 14:55:00.261 +0200 OS Version: 10.4.9 (Build 8P135) Report Version: 4 Command: php Path: /usr/local/bin/php Parent: bash [7590] Version: ??? (???) PID: 7604 Thread: 0 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_INVALID_ADDRESS (0x0001) at 0xbf7ffff0 Thread 0 Crashed: 0 php 0x004ae698 _zend_mm_alloc_int + 12 1 php 0x004afd48 _emalloc + 100 2 php 0x004b0410 _estrndup + 44 3 php 0x004c158c zend_get_constant_ex + 256 4 php 0x004c3470 zval_update_constant_ex + 340 5 php 0x004c3ca8 zval_update_constant + 44 6 php 0x004c171c zend_get_constant_ex + 656 lines 4-6 repeated 506 php 0x004c3ca8 zval_update_constant + 44 507 php 0x004c171c zend_get_constant_ex + 656 508 php 0x004c3470 zval_update_constant_ex + 340 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=41633&edit=1
