show_condition = conds.line_begin

[Gargantuar314]

I'm using nvim-cmp with saadparwaiz1/cmp_luasnip. Upon loading the latter, the simple snippet

return {

s({
    trig = 'beg',
    name = 'begin/end environment',
    condition = conds.line_begin,
    show_condition = conds.line_begin
}, {
    t('\\begin{'), i(1), t('}'),
    n(2, '['), i(2), n(2, ']'),
    t({'', '\t'}), i(0),
    t({'', '\\end{'}), rep(1), t('}')
})

}, {}

throws the error

Error detected while processing TextChangedI Autocommands for "*":
Error executing lua callback: ...im/lazy/LuaSnip/lua/luasnip/extras/conditions/expand.lua:10: attempt to get length of local 'matched_trigger' (a nil value)
stack traceback:
        ...im/lazy/LuaSnip/lua/luasnip/extras/conditions/expand.lua:10: in function 'show_condition'
        ...cal/share/nvim/lazy/cmp_luasnip/lua/cmp_luasnip/init.lua:114: in function <...cal/share/nvim/lazy/cmp_luasnip/lua/cmp_luasnip/init.lua:112>
        vim/shared.lua: in function 'tbl_filter'
        ...cal/share/nvim/lazy/cmp_luasnip/lua/cmp_luasnip/init.lua:112: in function 'complete'
        .../tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/source.lua:342: in function 'complete'
        /home/tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:308: in function 'complete'
        /home/tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:178: in function 'callback'
        /home/tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:238: in function 'autoindent'
        /home/tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/core.lua:170: in function 'on_change'
        /home/tien/.local/share/nvim/lazy/nvim-cmp/lua/cmp/init.lua:372: in function 'callback'
        ...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:53: in function 'emit'
        ...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:14: in function <...local/share/nvim/lazy/nvim-cmp/lua/cmp/utils/autocmd.lua:13>

I think that the problem is that conds.line_begin has a signature that fits condition, but different from what show_condition expects. Is there a way to solve this? Note that as soon as a disable cmp_luasnip, everything works.

[evesdropper]

That's exactly the problem. I ran into the same issue (re: here, links to a few other pieces of information I found looking to fix the error). Strangely, I never had an issue with cmp_luasnip, just when I moved to blink.cmp.

I ended up implementing something like this though not a full solution for line_begin.