VIM crashes after executing xelatex and colorscheme

Comece reproduzindo o crash no MacVim com o .vimrc fornecido, o autocommand de colorscheme do WinEnter e o mapping de makeprg do xelatex. Compare o comportamento ao carregar um arquivo LaTeX, executar k e navegar para outro arquivo com o relatório de crash do macOS. Considera-se concluído quando navegar entre arquivos não causar mais o crash do MacVim neste cenário.

Describe the bug
When there is an autocommand to change the colorscheme Vim crashes after executing xelatex.

To Reproduce
Detailed steps to reproduce the behavior:

1. Include the code below in the .vimrc file:

let g:colors = "lucius"
augroup color
    au!
    au WinEnter * exe "colorscheme ".g:colors
augroup END

set makeprg=xelatex\ \-file\-line\-error\ \-interaction=nonstopmode
nmap <leader>k :exec "silent make ".shellescape(expand('%'))<cr>

2. Load a latex file
3. Compile with <leader>k
4. Navigate to another latex file
5. Vim crashes

See report below:

Process:               MacVim [33498]
Path:                  /Applications/MacVim.app/Contents/MacOS/MacVim
Identifier:            org.vim.MacVim
Version:               8.2.2164 (169)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           MacVim [33498]
User ID:               502

Date/Time:             2021-07-21 18:42:43.350 -0700
OS Version:            Mac OS X 10.15.7 (19H2)
Report Version:        12
Bridge OS Version:     4.6 (17P6610)
Anonymous UUID:        35483298-412C-44A4-AED8-52EE10686945

Sleep/Wake UUID:       A07E24BD-D769-40DF-B2B1-77023F65444C

Time Awake Since Boot: 14000 seconds
Time Since Wake:       4400 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x000076141ecb4d88
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [33498]

VM Regions Near 0x76141ecb4d88:
    Stack                  00007000021fc000-000070000227e000 [  520K] rw-/rwx SM=COW  thread 6
--> 
    MALLOC_TINY            00007f84c8400000-00007f84c8500000 [ 1024K] rw-/rwx SM=PRV  

Application Specific Information:
objc_msgSend() selector name: retain

Expected behavior
Vim should load new file without crashing.

Environment (please complete the following information):

• Vim version: 8.2 (Dec 19 2020)
• OS: MacOS 10.15.7
• Terminal: GUI