:Luadev error E944

[Justin M. Keyes]

With Nvim current master, :Luadev command gives me this error:

E5105: Error while calling lua chunk: ...config/nvim/pack/minpac/start/nvim-luadev/lua/luadev.lua:14: Vim(return):E944: Reverse range in character class

Weird, that line is:

a.nvim_buf_set_name(buf, "[nvim-lua]")

but sure enough, if I change "[nvim-lua]" to "foo" then the error goes away and a "foo" buffer is created. (But it does not have REPL features, just a normal empty buffer, presumably because the plugin is looking for [nvim-lua] buffer.)

Maybe a bug in nvim_buf_set_name() ?

[bfredl]

Cannot reproduce. Maybe it depends on one of the myriad options that change multibyte/charset processing in vim.

but sure enough, if I change "[nvim-lua]" to "foo" then the error goes away and a "foo" buffer is created. (But it does not have REPL features, just a normal empty buffer, presumably because the plugin is looking for [nvim-lua] buffer.)

The plugin doesn't care about the name of the buffer, it saves a reference to it. Note: there is no enforced behavior, you have to map to the <plug> bindings yourself for anything to happen.

[bfredl]

Also, rename buffer will invoke autocmds nvim_buf_set_name claims. Perhaps test with -u NORC + luadev only?

[bfredl]

More specifically BufFilePost will observe the new name.

[Justin M. Keyes]

Bingo, looks like a vim-projectionist bug. Thanks!

:edit [nvim-lua]

Error detected while processing function ProjectionistDetect[26]..<SNR>54_has[7]..<SNR>54_nscall:
line    4:
E944: Reverse range in character class