E377: Invalid %- in format string when updating errorformat in init.lua

[Heryz1]

Hello,

I am trying to add Python backtrace to errorformat in my neovim init.lua :

I added the following line to my init.lua :

vim.opt.errorformat:append { "%.%#File \"%f\"\\, line %l%.%#" }

when I start my neovim everything works fine.

When I use asyncrun, it immediately shows the following error :

Error detected while processing function AsyncRun_Job_OnTimer[12]..<SNR>24_AsyncRun_Job_Update[40]..<SNR>24_AppendText: line 33: E377: Invalid %- in format string

When I add the errorformat using ex command, every thing works fine :

:set errorformat+=%.%#File\ \"%f\"\\,\ line\ %l%.%#

Do you know why I have this error ?

[Heryz1]

Sorry issue is not part of AsyncRun