### Description The following code: ```php <?php $callback = function () {}; ini_set("fiber.stack_size", ""); $fiber = new Fiber($callback); $fiber->start(); ``` Resulted in this output: ``` php_asan/Zend/zend_fibers.c:205: zend_fiber_stack *zend_fiber_stack_allocate(size_t): Assertion `size >= page_size + 1 * page_size' failed. ``` git commit: 84af629e7e33dba755d93dceff93fccdd9996ecd Build config: ``` ./configure --disable-all --enable-address-sanitizer --disable-phpdbg --disable-cgi --with-pic --enable-debug-assertions make -j ``` ### PHP Version PHP 8.3.0-dev ### Operating System _No response_