patch 8.1.0019: error when defining a Lambda with index of a function result commit https://github.com/vim/vim/commit/b4518563c73460150344a57879bf5b22cb8b1c77 Author: Bram Moolenaar <Bram@vim.org> Date: Tue May 22 18:31:35 2018 +0200 patch 8.1.0019: error when defining a Lambda with index of a function result Problem: Error when defining a Lambda with index of a function result. Solution: When not evaluating an expression and skipping a function call, set the return value to VAR_UNKNOWN.

" Vim compiler file
" Compiler:     ATT neato
" Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
" Last Change:	2004 May 16

if exists("current_compiler")
  finish
endif
let current_compiler = "neato"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

CompilerSet makeprg=neato\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"