patch 8.1.1964: crash when using nested map() and filter() Commit: https://github.com/vim/vim/commit/c36350bca3eed8ef97061e28c38b5b89cae1f13e Author: Bram Moolenaar <Bram@vim.org> Date: Mon Sep 2 20:44:07 2019 +0200 patch 8.1.1964: crash when using nested map() and filter() Problem: Crash when using nested map() and filter(). Solution: Do not set the v:key type to string without clearing the pointer.

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