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Date: Sat, 6 Feb 2016 10:50:11 -0800
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Subject: Re: [PHP-DEV] Segmentation fault in PHP 7.0.3 (and earlier versions)
From: rasmus@lerdorf.com (Rasmus Lerdorf)

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On 02/06/2016 10:10 AM, Simon Svensson wrote:
> On 05/02/16 22:29, Rasmus Lerdorf wrote:
>> On 02/05/2016 11:39 AM, Simon Svensson wrote:
>>> I am unable to reproduce the error with this recompiled source, both
>>> with the /usr/local/php70/bin/php and /usr/local/php70-debug/bin/php.=

>>> This is the same experience I had with earlier releases, where I have=

>>> been unable to reproduce the segmentation faults when recompiling (bu=
t
>>> always have them occur from the ppa).
>>>
>>> Is there any guide for compiling the source? I could attempt to setup=
 a
>>> new virtual machine with Ubuntu 14.04 (instead of php7dev's Debian) t=
o
>>> reproduce the error, but I do know know the steps needed to compile
>>> everything.
>>>
>>> The newly build, and working, versions:
>>>
>>> /usr/local/php70/bin/php --version:
>>> PHP 7.0.4-dev (cli) (built: Feb  5 2016 19:14:08) ( NTS )
>>> Copyright (c) 1997-2016 The PHP Group
>>> Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
>>>     with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend
>>> Technologies
>>>
>>> /usr/local/php70-debug/bin/php --version:
>>> PHP 7.0.4-dev (cli) (built: Feb  5 2016 19:19:10) ( NTS DEBUG )
>>> Copyright (c) 1997-2016 The PHP Group
>>> Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
>>>     with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend
>>> Technologies
>>
>> "php -i" will show you the configure flags that were used to build it,=

>> so you could try to match those to see if you can reproduce with sourc=
es
>> from php.net. Otherwise, if it is something that only happens with the=

>> distro build then there isn't a while lot we can do to help you.
>>
>> -Rasmus
>>
>>
>=20
> An update to avoid leaving the thread hanging in suspense.
>=20
> I was in contact with Ond=C5=99ej Sur=C3=BD, the author of the PPA I wa=
s using,
> and got help in grabbing build-logs so that I should be able to
> reproduce the compile locally, this time without all the optimization.
> However, since I still do not speak configure-ish I failed to resolve
> all packages/libraries needed for a complete build, but I managed to
> smash my keyboard enough to get a working configure & make.
>=20
> My test-suite now terminates like this:
>=20
> PHPUnit 4.8.21 by Sebastian Bergmann and contributors.
>=20
> Runtime:    PHP 7.0.3
> Configuration:  /root/web/phpunit.xml
>=20
> ...........................................   43 / 1229 (  3%)
> ...........................................   86 / 1229 (  6%)
> ...........................................  129 / 1229 ( 10%)
> ...........................................  172 / 1229 ( 13%)
> ...........................................  215 / 1229 ( 17%)
> ...............R...........................  258 / 1229 ( 20%)
> ...........................................  301 / 1229 ( 24%)
> ...........................................  344 / 1229 ( 27%)
> .R.R.....................R.................  387 / 1229 ( 31%)
> ...........................................  430 / 1229 ( 34%)
> ...........................................  473 / 1229 ( 38%)
> ...........................................  516 / 1229 ( 41%)
> ...........................................  559 / 1229 ( 45%)
> ...........................................  602 / 1229 ( 48%)
> ...........................................  645 / 1229 ( 52%)
> .php: /root/php-src/Zend/zend_execute.h:275:
> zend_vm_stack_free_call_frame_ex: Assertion
> `(executor_globals.vm_stack_top) > (zval *) (executor_globals.vm_stack)=

> && (executor_globals.vm_stack_end) > (zval *)
> (executor_globals.vm_stack) && (executor_globals.vm_stack_top) <=3D
> (executor_globals.vm_stack_end)' failed.
> Aborted (core dumped)
>=20
> The failed assertion and my backtrace matches exactly that of
> https://bugs.php.net/bug.php?id=3D71474 which was fixed a few days ago,=

> and is not part of the 7.0.3 release. It's part of the PHP-7.0 branch,
> so I presume this will be fixed in the 7.0.4 release.
>=20
> I've recompiled using the PHP-7.0 branch, and my test-suite works there=
=2E
> I look forward to the 7.0.4 release!

Thank you very much for your persistence on this. It is motivating for
us when people put a bit of effort into tracking down issues. And yes,
that fix will be in 7.0.4. It came in too late to be part of 7.0.3.

-Rasmus



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