Hi,

If you want me to have a look at this, I need to be able to reproduce this on a Linux platform. That means, I need to have your extension's source code.
I can't go on just a Windows crash dump.

cheers,
Derick

Considering that the entension is proprietary code from the company I work for, that may prove difficult.

What I get from the debug call stack is this:

[Inline Frame] php7.dll!zend_mm_alloc_small(_zend_mm_heap ) Line 1273
[Inline Frame] php7.dll!zend_mm_alloc_heap(_zend_mm_heap heap, unsigned int) Line 1344
[Inline Frame] php7.dll!_emalloc(unsigned int) Line 2433
php7.dll!_array_init(_zval_struct arg, unsigned int size) Line 1090
[Inline Frame] php7.dll!php_register_server_variables() Line 626
php7.dll!php_auto_globals_create_server(_zend_string name) Line 780
php7.dll!zend_is_auto_global_str(char name, unsigned int len) Line 1653
[Inline Frame] php_xdebug.dll!xdebug_init_auto_globals() Line 1083
php_xdebug.dll!zm_activate_xdebug(int type, int module_number) Line 1186
php7.dll!zend_activate_modules() Line 2600
php7.dll!php_request_startup() Line 1697
php.exe!do_cli(int argc, char argv) Line 728
php.exe!main(int argc, char * argv) Line 1406

Sorry, I can't help then. Feel free to reach out privately in case you can provide this privately — email is at https://xdebug.org/support.php#email

In case you were curious about this, I was able to resolve this issue. The problem was a zend_string pointer not being properly freed (efree() was called on the zend_string->val instead of calling zend_string_release().

When I updated to PHP 7.2.1 the crash location changed from inside the xdebug extension to the mysqldn extension. Fun times :)

OK. Good to know it wasn't in Xdebug then. Cheers!