Edit report at https://bugs.php.net/bug.php?id=71261&edit=1
ID: 71261
User updated by: jo at feuersee dot de
Reported by: jo at feuersee dot de
Summary: Wrong bytecode in cache of array index named 'init'
containing 0 indexed subarr
-Status: Feedback
+Status: Assigned
Type: Bug
Package: opcache
Operating System: Linux
PHP Version: 7.0.1
Assigned To: laruence
Block user comment: N
Private report: N
New Comment:
Would it be useful to provide a trace of PHP running with built-in webserver?
Running the script via CLI doesn't looks useful as I can't reproduce the bug there (the
opcache is invalid after execution, thus always regenerated). And Apache2 doesn't core dump at
all, can't see the problem why. This isn't my kind of cake...
Previous Comments:
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[2016-01-02 05:03:20] laruence@php.net
you can also try to make it coredump with "opcache.protect_memory=1 ", and paste the
backtrace here. thanks
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[2016-01-01 21:00:41] jo at feuersee dot de
THX. Unfortunately, the used binaries for openSUSE Leap 42.1 (from http://download.opensuse.org/repositories/devel:/languages:/php:/php7/openSUSE_Leap_42.1/)
have debug mode disabled.
I'll check over the WE wether installing PHP7 from source is less painful than changing the app
to work in CLI context.
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[2016-01-01 19:56:44] nikic@php.net
If your code is runnable using CLI, the easiest way to get a backtrace is through valgrind. Just run
valgrind php ...args...
Alternatively, using gdb run "gdb --args php ...args..." and then "r" followed
by "bt" in the gdb prompt.
If it doesn't run through cli it's probably easiest to get the backtrace from a core file,
we have some info on that here: https://bugs.php.net/bugs-generating-backtrace.php
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[2016-01-01 19:35:32] jo at feuersee dot de
Yep, it crashes with opcache.protect_memory=1 "child pid 2844 exit signal Segmentation
fault"
Unfortunately, xdebug fails to start due to API version 320151012.
Is there another convenient way to provide a backtrace?
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[2016-01-01 18:11:52] nikic@php.net
Thanks, so the optimizer is not the culprit. Can you do a run with opcache.protect_memory=1 and see
if it crashes (segfault or some such)? And if so, get a backtrace?
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