could you please paste the two files out here？

Given their size, how about just direct text links:

http://svn.automattic.com/bbpress/tags/0.9.0.7/bb-includes/l10n.php

http://svn.automattic.com/bbpress/tags/0.9.0.7/bb-includes/compat.php

(I don't see anything special about them but maybe you know better)

I should also note, the error only happens ONCE upon php-fpm restart, perhaps when those two scripts are put into the cache the first time?

If I restart php-fpm I can consistently reproduce the error.

The start/end/real numbers change of course.

Maybe somewhat relevant it is in an openvz vps container but in theory that should not affect php?

Happy to test any patch you'd like to try.

I also see this bug with 7.0.0RC2 x64 TS + Apache/2.4.16 x64 on Windows 10 x64

Error message is shown only on some certain PHP scripts, not all of them. Here is a part of Apache log:

Sun Sep  6 11:28:12 2015 (5668): Warning Internal error: wrong size calculation: D:\HTTPS-SERVER\mysqladm1n007\libraries\user_preferences.lib.php start=0x20775678, end=0x2077d288, real=0x2077d268

Sun Sep  6 11:28:21 2015 (5656): Warning Internal error: wrong size calculation: D:\HTTPS-SERVER\mysqladm1n007\libraries\transformations.lib.php start=0x208c1758, end=0x208cbff0, real=0x208cbfd0

Mon Sep  7 15:50:44 2015 (4904): Warning Internal error: wrong size calculation: D:\HTTPS-SERVER\mysqladm1n007\libraries\user_preferences.lib.php start=0x20755448, end=0x2075d058, real=0x2075d038

@tm8544 please check the latest master.

Thanks.

@"ck+php dot net" #69838 is similar, but this one looks like have been caused by some change after it. Please check now.

Thanks.

@ab - Appears to have solved the problem, no more warnings. Many thanks.

Thanks for the verification )

Could you give me a download link to latest master build for win x64 so I can also verify if the problem is gone.

You can download Windows snapshots from
<http://windows.php.net/snapshots/#php-master> or
<http://windows.php.net/downloads/snaps/master/>.

I tested with build php-master-ts-windows-vc14-x64-re0f390c

With 7.0.0RC2 Opcache produced internal error:wrong size calculation on some PhpMyAdmin php-scripts.

Now, with this master build, phpmyadmin causes Apache to crash.
Other PHP scripts seems to work as expected.
When I go back to 7.0.0RC1, PhPMyAdmin runs fine.

Pasted from event log:
Viallisen sovelluksen nimi: httpd.exe, versio: 2.4.16.0, aikaleima: 0x55af7bf2
Viallisen moduulin nimi: php7ts.dll, versio: 7.0.0.0, aikaleima: 0x55f01d28
Poikkeuskoodi: 0xc0000005
Virhepoikkeama: 0x000000000021a7ab
Viallisen prosessin tunnus: 0x16f4
Viallisen sovelluksen käynnistysaika: 0x01d0eb20faeea3da
Viallisen sovelluksen polku: C:\Program Files\Apache Software Foundation\Apache24\bin\httpd.exe
Viallisen moduulin polku: C:\PHP\php7ts.dll
Raportin tunnus: 305afb4d-548c-4632-931a-eaee1a9e990e
Viallisen paketin koko nimi: 
Viallisen paketin suhteellinen sovellustunnus: 

Server: W10 pro x64
Apache 2.6.14
PhpMyadmin 4.4.14.1

Tested again with build php-master-ts-windows-vc14-x64-re0f390c.
This time OpCache was disabled.
Same result with PhpMyAdmin, Apache httpd crashed.
All other PHP applications run as expected.
Strange.