SHM issues PHP7 x64

There is a reproducable SHM issue with php_apcu.dll in PHP 7 NTS x64: https://github.com/krakjoe/apcu/issues/223#issuecomment-288202260 I thought that could be due to the special method that apcu uses to create a SHM block. It directly loads ntdll.dll: https://github.com/krakjoe/apcu/blob/master/apc_windows_srwlock_kernel.c#L63 I tried to reproduce this issue on AppVeyor, but failed: https://github.com/krakjoe/apcu/pull/240 My conclusion at that time was, that php_apcu.dll is broken on x64. In PHP7 only, because it works perfectly in PHP 5.6. But today I ran into an issue that seems related. On a Windows 2008 R2 (development) server I am running Apache/2.4.25 (Win64) PHP/7.1.4 OpenSSL/1.0.2k-fips mod_fcgid/2.3.9. The server is really low traffic. There is a Drupal 7 site running on it with me as the only user. Drupal 7 runs with PHP 7.1.4 NTS x64 under mod_fcgid, without php_apcu.dll. The site reproduced Internal server errors 500 today. Nothing in the logs except that "the pipe had been ended", indicating that php-cgi.exe did not return anything to mod_fcgid. Then I checked eventvrw.msc. Error message in Zend OPcache: |Base address marks unusable memory region. Please setup |opcache.file_cache and opcache.file_cache_fallback directives for more |convenient Opcache usage | Attempt to access invalid address This error message is SHM related as well, according to Anatol: http://markmail.org/message/hhieta6jpzocnvll#query:+page:1+mid:cyq7g7fcibunrdr2+state:results I cannot easily reproduce the Error 500 on my Win2k8 server. They disappeared after the php-cgi.exe instance had been killed by Apache: [Thu Apr 13 10:17:55.795816 2017] [fcgid:warn] [pid 7264:tid 828] mod_fcgid: process 5604 graceful kill fail, sending SIGKILL But the problem with php_apcu.dll is reproducable on my Win7 Pro laptop and on the Win2k8 server. https://github.com/krakjoe/apcu/pull/240#issuecomment-288365944 Ugly problem. Is there anything I can do to get it solved? -- Jan