Fix prefetcher crash
treec6a1e866a6f79c633e6bb8a2054bec78d0f3affd
drwxr-xr-x - .github
-rw-r--r-- 1545 .gitignore
-rw-r--r-- 1687 .gitmodules
drwxr-xr-x - CMake
-rw-r--r-- 3931 CMakeLists.txt
-rw-r--r-- 3356 CODE_OF_CONDUCT.md
-rw-r--r-- 3334 CONTRIBUTING.md
-rw-r--r-- 3204 LICENSE.PHP
-rw-r--r-- 2803 LICENSE.ZEND
-rw-r--r-- 2768 README.md
-rw-r--r-- 449 SECURITY.md
-rwxr-xr-x 642 configure
drwxr-xr-x - hphp
drwxr-xr-x - patches
drwxr-xr-x - third-party