patch 8.2.0483: Vim9: "let x = x + 1" does not give an error Commit: https://github.com/vim/vim/commit/d25ec2cfa0c25c3b00b7f8963b8aea799df1f20a Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 30 21:05:45 2020 +0200 patch 8.2.0483: Vim9: "let x = x + 1" does not give an error Problem: Vim9: "let x = x + 1" does not give an error. Solution: Hide the variable when compiling the expression.

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

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

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

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