patch 8.1.0121: crash when using ballooneval related to 'vartabstop' commit https://github.com/vim/vim/commit/ca4b613c692b927c9345dc9e3d6be5de35266be2 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 28 12:05:11 2018 +0200 patch 8.1.0121: crash when using ballooneval related to 'vartabstop' Problem: Crash when using ballooneval related to 'vartabstop'. Solution: Initialize balloonEval->vts to NULL. (Markus Braun)

See Vim solve the towers of Hanoi!

Instructions:
   type ":so hanoi.vim<RETURN>" to load the macros
   type "g" to start it

and watch it go.

     to quit type ":q!<RETURN>"
to interrupt type CTRL-C

(This text will disappear as soon as you type "g")