patch 8.0.0596: crash when complete() called after complete_add() commit https://github.com/vim/vim/commit/4475b623960671898dac6a72b13a8d140402afa6 Author: Bram Moolenaar <Bram@vim.org> Date: Mon May 1 20:46:52 2017 +0200 patch 8.0.0596: crash when complete() called after complete_add() Problem: Crash when complete() is called after complete_add() in 'completefunc'. (Lifepillar) Solution: Bail out if compl_pattern is NULL. (closes #1668) Also avoid using freed memory.

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