patch 8.2.2887: crash when passing null string to fullcommand() Commit: https://github.com/vim/vim/commit/4c8e8c6e19b75d632b042aa0ba0a2ab769b2162e Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 26 19:49:09 2021 +0200 patch 8.2.2887: crash when passing null string to fullcommand() Problem: Crash when passing null string to fullcommand(). Solution: Check for NULL pointer. (closes https://github.com/vim/vim/issues/8256)